Malicious PDF — malware analysis report

Static analysis result for SHA-256 444b9803c4187bbe…

MALICIOUS

PDF

78.5 KB Created: 2021-03-04 17:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 51fb56935ec1e411196e399fb4edea34 SHA-1: a09f52d3f892523e080adce6fb97d09ef44fa91b SHA-256: 444b9803c4187bbe1ba572fece14c4f69ae67deaf230293b22865edb5ffd33fb
166 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm and a lure for a password-protected archive, suggesting it's a phishing or malware delivery mechanism. The embedded URL points to a site offering a "free download" of an "Amazon gift card generator", which is a common social engineering tactic. While no scripts were directly extracted, the PDF structure and URL suggest it is designed to trick users into downloading a malicious payload, likely an archive requiring a password provided by the document itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • 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://seumenha.ru/wix?keyword=amazon+gift+card+generator+v4.11+free+download PDF link annotation
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/e0ce62.pdfIn PDF document text
    • https://tozabofosizo.weebly.com/uploads/1/3/5/3/135340530/zijesopokikezip.pdfIn PDF document text
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/xozafoxabolojutireki.pdfIn PDF document text
    • https://cdn.sqhk.co/fujigugi/gdiaoHN/zibofu.pdfIn PDF document text
    • http://kefinefure.iblogger.org/bio_rad_cfx_manager_software.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/divulexejeboribo.pdfIn PDF document text
    • https://galuxenezinex.weebly.com/uploads/1/3/4/4/134437763/towewunekemitis.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/ieighjh/68919185438.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/jeW6ggQ/23111442863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/catholic_mass_for_beginners.pdfIn PDF document text
    • http://tuzibepunu.rf.gd/dudanamimumanemutege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae28502e-a1a3-4fae-81ff-7c23caacfbdc/deskjet_2542_scan.pdfIn PDF document text
    • http://ninonasoligu.rf.gd/78061636192.pdfIn PDF document text
    • http://pekudus.rf.gd/4x6_index_cards_template.pdfIn PDF document text
    • http://baxujaxifibew.rf.gd/6016896922.pdfIn PDF document text
    • http://jojomuge.epizy.com/deriwezutogugekosokov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24c4410-d927-46bd-9f50-bb2615b0fd54/83329511211.pdfIn PDF document text
    • http://borobosen.rf.gd/74391163516.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/block_strike_mod_apk_money.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_off0000f4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 5528 bytes
SHA-256: 23cbff88954123a0d27fd7c27f9f7f42e65f3f978ac9229e3cd7116f77726d07
font_01_sfnt_off000107db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DB 10644 bytes
SHA-256: c0e94189f4cac1d138a55a2b7fa8eaf6eb391a42ae212242b16e9e51aafdae5d

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