Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8fd5ff8659ea51…

MALICIOUS

PDF

69.6 KB Created: 2021-05-24 23:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 32e7a32f92531202c1040629e4b428b4 SHA-1: ccbec18cf55e8ccc06b599912f93a6561aa02b5b SHA-256: 2d8fd5ff8659ea5132e95522d6030daec2c42bc6930f5acfd8edaf12b6c745fc
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malware or phish users. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to obtain a password to decrypt a subsequent payload, a common tactic for evading security gateways. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/uplcv?utm_term=gta+san+andreas+lite+apk+data+gpu+mali PDF link annotation
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/ddd190b71717763128bf213894bb24e8/zisafitesugimimulosafevi.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/b04015f5a6fde900eb692ff720d6408c/70353503286.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/25419801996.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8208122d09d4634362ab904fa7d8e825/punudebudibegan.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/rtuu1je05hhjcmkou1u7593ofh/raludadovomanamigigozesos.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0f978554e2a211aeba001facfd92aac9/seveta.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/84064407980.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/0bd7r50reqv0n9casoqtv7jscj/kibalolifujeranogibuf.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/tutilinatiludukirokirozo.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/pogewazutunagogod.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/84563119534.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3bfd3ad8---45754685770.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607604ac4b972---gexamoromutosisa.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070646e8fad2---92157673484.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/9dvh4fa3am6ilscpl4vlfv6p05/91698394537.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/fc60f5e008e235a55d324c3300c40577/8286406700.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 5372 bytes
SHA-256: d09bc8b239f1d87cdba32982451b8f39e0e5671d72f854d468df9966b45fd183
font_01_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 9972 bytes
SHA-256: f182fe7b5fce44bfc809740187bfebcf44b8493ce1c40a1f65457be6f8f31e11