Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bd6fd438bb34cd…

MALICIOUS

PDF

80.2 KB Created: 2021-06-10 00:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2c07326cc394e6fda04992af2d869957 SHA-1: 2ba66e27a4de15b3d26dfece2ff78537ce89f3ff SHA-256: a2bd6fd438bb34cd518e0a21ce205823a6ce208c7847aa8ba6c06d835b02760f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use WordPress upload vulnerabilities. The document body, though heavily obfuscated, suggests a lure related to 'Louise erdrich tracks pdf' and mentions wkhtmltopdf, indicating it's likely a phishing or malware distribution document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=louise+erdrich+tracks+pdf PDF link annotation
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/0m6vvndccpl5iol4gq6873b8at/tobevefux.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9cd033c9c9e18d5d7a36ec79de039267/buzowelutoxafono.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-1/20210501112758250008.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/203670980.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/nuvawejijafilej.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9116eb647---jumoku.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7d9bb45d2---bexuwenajuzozemegux.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d465e9b9fc---sikajepakunuxetoriv.pdfIn PDF document text
    • http://billsky.ee/files/file/dimokarinemeguluxuro.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5e1db436e---50598952928.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/d7bccd01602d4e705385cd0a8ba228a2/maforezivonemol.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf543be270---vasejazav.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/6o09i4ali12sc4otohl4drk6l7/guvodag.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098532e5660b---rumeduligavopub.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/54808801642.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072892ce5357---rixuxaxopinur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 5216 bytes
SHA-256: af1701b0661bef0ac47395fe7f19bc33c1250f58e6dbe20ea3c99f21c00ac8a8
font_01_sfnt_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 10852 bytes
SHA-256: b980d5bcf3044daef8daefbe1fb5cc6681c65a26e10ca7820e1118082bdaf24b
font_02_sfnt_off00011edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDD 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90