Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29fa596e923a131…

MALICIOUS

PDF

77.0 KB Created: 2021-02-13 02:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9f1d74e85d572e204d15f6c435a74a9b SHA-1: 892e74b1abc01f06635c0d6e2b7b8cab399a977b SHA-256: b29fa596e923a1316d526f96e72e3d41900129d40f7b6548653b2e1f24778eeb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded links and the overall detection suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=cydia+ios+13+widgets PDF link annotation
    • https://cdn.sqhk.co/karopepagu/Mjegezy/lathe_simulator_lite.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/rajirirexe_xovofa.pdfIn PDF document text
    • http://zukilobuzoroko.66ghz.com/shankar_movie_songs_free.pdfIn PDF document text
    • https://juwizezajofop.weebly.com/uploads/1/3/1/6/131637218/nawewutusuto-libamewo-muzumukotilep.pdfIn PDF document text
    • http://modebedunizux.iblogger.org/93954426931.pdfIn PDF document text
    • https://cdn.sqhk.co/fofasafiwi/jjPhbOB/fiwoxu.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/170e8e54f428e1.pdfIn PDF document text
    • http://bisikar.22web.org/jikuketilomavusob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_5fd2d85094aa0.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/GgeicqM/nagaxaravufejilozavuronez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485305/normal_5fedc750a2780.pdfIn PDF document text
    • https://zepifuvuxetota.weebly.com/uploads/1/3/6/0/136095774/7942567.pdfIn PDF document text
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/4964728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_6011732e43483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459326/normal_5fff32a44ccc9.pdfIn PDF document text
    • https://lolifibek.weebly.com/uploads/1/3/4/6/134634661/9410088.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418747/normal_5ff1749790ab1.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/wapabefizosumi/lagu_yang_terdalam_cover_fatin_shidqia.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/awdhesh_premi_video_song_mp4.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_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 5180 bytes
SHA-256: f1d13985d68ccacfc3e24fcc5131a06ce86d8eaff736a6cd238eb4cf2491d8ad
font_01_sfnt_off0000fed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 12204 bytes
SHA-256: b72b52f287ea5a74c10fa25803e36af3fbb12632619c6899d2d7f7f2d8260e86

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