Malicious PDF — malware analysis report

Static analysis result for SHA-256 74542a59aa52ce0c…

MALICIOUS

PDF

74.5 KB Created: 2021-09-08 04:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6e0a06572c1f306e0f365f0ae6e15189 SHA-1: 89881229e0732ed0a748080cd46df778f104d640 SHA-256: 74542a59aa52ce0c65a32965f988270ca51da9656946140d443cff22fb00c97a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on such hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://drafthe.ru/uplcv?utm_term=economic+analysis+moral+philosophy+and+public+policy+3rd+edition+pdf PDF link annotation
    • https://agatanorek.com/files/file/4324437820.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/jaxiloxupisuwupofonazaduv.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/5o4ghamr2gnmcovtpkemtq9694/fizuvepinimuremub.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea08826223---bonogilote.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/98703802130.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/5026472355.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/tawawemutabogojo.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/poxufigoxojujovo.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081e13ee4c2b---94312982527.pdfIn PDF document text
    • https://cncunse.com/d/files/lamajoritezotidejovitesiv.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/6d1c488b622f7c77ae9a90c32af01304/fifonobosuku.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/93879828846.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c564f4239---rumerizukuwituviburilam.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/tupetugodesaferumoperorub.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/2a9bc97e9ce33ff395a18fa887e1f9bd/95945195922.pdfIn PDF document text
    • http://sbkf.org/files/files/falutaj.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/dujulugudarebigoranaw.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210705232920.pdfIn PDF document text
    • https://kildevangen.dk/files/muviwer.pdfIn PDF document text
    • http://darec.sk/files/files/59472828167.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/binaritagebaxutanotodag.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_off0000bf93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF93 11396 bytes
SHA-256: 428e9fb0c542ce4b5f4918920f5b615c12cdc2a5ac64d4689b7ad201da5b4f05
font_01_sfnt_off0000da07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA07 16232 bytes
SHA-256: 713e17a316a2303adb9aa70dabaa782480201663cff787d26d40e7ce17846569
font_02_sfnt_off00010348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1