Malicious PDF — malware analysis report

Static analysis result for SHA-256 628f1b415e01d448…

MALICIOUS

PDF

108.4 KB Created: 2021-06-29 10:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 89a00b982e7717d67364888ddd5b8b44 SHA-1: 168bd33277ff707cc0766c69c74540005520c2d7 SHA-256: 628f1b415e01d448adaefe4101891d971e8e07ee23368300c8db4767f006eb62
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to compromised WordPress sites, including one using a raw IP address, suggesting a phishing or malware distribution attempt. The embedded URLs are likely used to redirect the user to malicious content, potentially for credential harvesting or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/b628aae800cfd36008d68c8bc7ea9dab/85025226257.pdf In PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ba7d8tjfl6kiav58h3t94adgl5/giromemokupupatosikokonuj.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-18/20210518144853536541.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/pepuxowufilonon.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076da74c9fb6---18384523960.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094bc9ce4f34---88754614587.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/84028271424.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/17604eb15f8c14da087a5ecc5e24b56f/jobazubin.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/suda61kcd86v2b63up2q8fvi06/siwonofona.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/1b30e6a338006e7a644bab171da8bd30/87635570121.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7b5d47794---27953244328.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd83e4c114---masagenorogedakezukosiz.pdfPDF link annotation
    • http://deepakbatteries.com/uploads/file/kujukitelowosubo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fe4d158ce37025dc5fbcdeb53cd0c51c/36968911627.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/matilizijixeratisilewaxi.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/65105777649.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/efb145cb65912e347d548bb6a21643be/pavixiwekez.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/nasiwadejile.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/irrqh1k8ie2i7esl6uaupuavg8/87676577269.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609835bbe7327---mutugakunixuxudovi.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/thham4qp0cravul3t5q8j724q7/56071305197.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/vatusonezufawosopofexa.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16205871418303.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e10b7b330---wuvegefegeg.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607768d9eb37d---25458321510.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/037ce16c1e7c6174f0a9cd8a39d226fb/fubuzadexuxajejaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+the+tigers+name+in+the+jungle+bookPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDC 22928 bytes
SHA-256: efb79b485d6a6d934c8b59c707b8898653b2d7bfd5835130972f79da91304d01
font_01_sfnt_off0001585a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1585A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001706b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1706B 17296 bytes
SHA-256: 5a8f84f5bc72843c4bc332cef6a8d32de9b61cceecc841a518f182f84b06876e
font_03_sfnt_off00018a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A24 11008 bytes
SHA-256: 77763d3b91ce5f61d5451168b9d5b08e857c765560d914c0adc39fcf24e1bb63

Open this report in the interactive analyzer, or submit your own file for analysis.