Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5ed3ae41e597b5…

MALICIOUS

PDF

88.3 KB Created: 2021-09-17 10:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b2aa9694903526aea24ec99e3168b74 SHA-1: 28c5d9238633761c19fdd262f720a3b68a7a10b4 SHA-256: 5a5ed3ae41e597b552dffcc6d37e244231c425ba060204ca56ac601e46616d4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. These URLs are likely part of a phishing or scam campaign, aiming to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=how+to+make+city+in+lokicraft PDF link annotation
    • http://rayer.cn/d/files/57450227631.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/pedufu.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/xaxupuwutavidunosegiwale.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/naxoramepaxokawizegomi.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f0a324c29---85492830897.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/gonurepovamero.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/56894308936.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/rukef.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/gexirezumepovinipi.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/jotigiw.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/tisededuzosoral.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/2142177847.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///kobujopenudowu.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/tururiza.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/6f454687d300aa22b724340c725857f7/29283194885.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/wujuzozibojerapiwifeja.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/rizoputilen.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/govosikezedanuxinuda.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9115a8e97---38770416222.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/18298008997.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/29674476427.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/pewumiramilexizefo.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/mepigir.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/temow.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614415d44b632---wigupan.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_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 18752 bytes
SHA-256: 7d4eb497ef9b3f30a00a590438e5a5e38007d54c51d7069788f018c21d3e95f2
font_02_sfnt_off00013b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3A 10612 bytes
SHA-256: 21582318562c94f9d5b2041f087d6a72f04946162eab4c0997dc3792f2203d83

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