Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b1739be218cdcc…

MALICIOUS

PDF

79.6 KB Created: 2021-05-10 06:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f72f325a58b27ea20234b97994b7135a SHA-1: 8c0db86cfaf6317189590e7c1471dccd8bc2d9e5 SHA-256: 92b1739be218cdcc8e5b5f99feff26da279b99a461147c3c6425c30d867f0981
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=certified+ethical+hacking+institute+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388165/normal_603b59bae0076.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/tamil_news_paper_free_download.pdfIn PDF document text
    • https://niregesop.weebly.com/uploads/1/3/0/7/130776037/lewobobuwunamu.pdfIn PDF document text
    • http://xinupavob.iblogger.org/noxerokajokiposemep.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/9244551.pdfIn PDF document text
    • https://napuguvu.weebly.com/uploads/1/3/0/9/130969658/9819843.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/how_to_learn_lean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_6063c89dc9c50.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/0c9f3c.pdfIn PDF document text
    • https://nuravodabola.weebly.com/uploads/1/3/0/7/130740537/bepuvev-lowuzejuzo-xibejevi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422367/normal_5ff2848dd7248.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/alyson_noel_evermore_download.pdfIn PDF document text
    • http://kidalozexeneni.iblogger.org/body_code_healing_system.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/nakevoja/resaledadozos.pdfIn PDF document text
    • http://xodolipifonabo.epizy.com/mibalemigamid.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/civil_disobedience_commonlit_answers.pdfIn PDF document text
    • http://pizodixevefok.rf.gd/pujagoxubamiradapovalobo.pdfIn PDF document text
    • http://vuruxujiga.rf.gd/manual_de_asepsia_y_antisepsia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78c1be5-31e6-4a9b-96b2-32a32d4089d5/48065725049.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/46152448622.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/rekivunepiwalerepuxa.pdfIn PDF document text
    • http://farovosodiwes.atwebpages.com/histoire_cheikh_ahmadou_bamba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf5f5eb-8519-49a7-a8c1-d08befec3172/musog.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/rifuvonabi.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_off0000f8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F8 5252 bytes
SHA-256: fc3b2b140b935d6f21b5bd1e1d5510bc2afe6ced7693bfbbcdfdaa486fe06d38
font_01_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 10664 bytes
SHA-256: def4808fe2260c95016619de929d937d48c7b3b6e960b1c46ef871f318d08a56