Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce48c15903bd4eae…

MALICIOUS

PDF

70.3 KB Created: 2021-09-13 09:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 14cfd3f3b07ffcae95e5d720a55fcbb9 SHA-1: c4bfe6052b4b0d9f3870bb868969e74913a232cd SHA-256: ce48c15903bd4eae0b068873afd5ce45439e90efc5000d8eb7f2365880910e0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=123movies+saw+6 PDF link annotation
    • http://tech-sub.com/userfiles/file/gebinike.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/jopoj.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/mafawov.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/kufupodalomebawijurawa.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/wakusozavotoronopu.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/lazefularodizejosibokib.pdfIn PDF document text
    • http://prompol.com/media/file/19559061748.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130854de868d---57039739911.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/85334109040.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/xirazidifusurogoza.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16135f3c59ab26---fidukinu.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/davagarawixekuvo.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/16121166179.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c17ea514819a83eb036428b303a0b442/dogofopazuxuketeg.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/gavokefimadaruse.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/45806020886.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/56557742063.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/6771498682.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/pabibininokelosiledipeva.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4c7d25dd3---61600598389.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/muregogejo.pdfIn PDF document text
    • http://lizhechem.com/upload/files/parilixukaliwarexivesuduz.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/44716796723.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/sixovomidifisigameb.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/pizedot.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F3 14956 bytes
SHA-256: 494e4087c99ee528486ca098abe1aded732b77c49821b5be0498a96498088f42
font_01_sfnt_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 10488 bytes
SHA-256: c686d9f60458799c644c865c8249e75899d56f435ef90feabbd0e5a052699b82
font_02_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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