Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb86a4e29f6acf5e…

MALICIOUS

PDF

72.5 KB Created: 2021-02-19 01:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 179bbee01b767703a998ae782cc44536 SHA-1: ba004161ad7f1fe018a6209038109ee9460a7530 SHA-256: bb86a4e29f6acf5ea77e7f489c18e9156d1a51ca12e2948735e0f2827d632241
146 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URIs pointing to external websites, flagged by heuristics as a link farm and potentially malicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://maypoin.ru/strik?utm_term=which+fridge+brand+is+best PDF link annotation
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/lemobudajuzalaji.pdfIn PDF document text
    • http://com-connexion.xyz/50745269834shks1.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/febipuguk_fifor.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/bawirufuluj.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/Jriisjc/airline_manager_4_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/Hghopge/qr_code_scanner_fur_iphone_5s.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/jhaMii0/gothic_western_boots.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/iX8Y3ii/gekaz.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/jyijijD/bivewuxuxixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5ff5241bea45c.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/jefumufetet-tanavaxodi-vitodez-legutalefojuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxepusiz.rf.gd/24151073807.pdfIn PDF document text
    • http://zexizel.epizy.com/filmora_full_crack_for_mac.pdfIn PDF document text
    • http://nakewifowid.rf.gd/95421544789.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 5404 bytes
SHA-256: 41e2f450b9a5ca903750848af5e1d138c19db022ba044b353c60c171e1311e27
font_01_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 10384 bytes
SHA-256: e0c35c6ee3ffb65fdf8d40facc4c9b5325c1877d90a52d12ef735d1d0199c432

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