Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ceb56b221306989…

MALICIOUS

PDF

78.1 KB Created: 2021-03-28 09:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a6c0412a0dad3ca1287611253cb048bb SHA-1: cfc7f6086a73208baa5a5c2e7e76b7db0b3d8714 SHA-256: 9ceb56b221306989dae6561efe54ef443b7688e9a9fcae8c25b8518c59946c77
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a large number of embedded URLs, many of which point to disposable domains or link farms, indicating a strong intent to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and the high number of external links suggest it is designed to exploit users through deceptive content and redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=detroit+lions+injury+report+week+4+2018 PDF link annotation
    • https://cdn.sqhk.co/lajoroteb/jaha1hi/98755419996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403121/normal_5fee656feb5b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_605c5d7d882ca.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/ivgdiax/padevozizipukima.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/pibidijatejunupajo.pdfIn PDF document text
    • https://galinigogazefu.weebly.com/uploads/1/3/2/6/132695851/348711.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/6R5tib3/wabamikedunuwaluzomibipe.pdfIn PDF document text
    • http://fimosabu.iblogger.org/venezuela_political_crisis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387925/normal_600477e078c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fea24ec8daca.pdfIn PDF document text
    • http://monufovaxuj.66ghz.com/hemoglobin_a1c_screening_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fefdcdb6d705.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/vjeijx9/6261490074.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/2208390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446646/normal_5fe2e5119d3ab.pdfIn PDF document text
    • https://tagewojozupuk.weebly.com/uploads/1/3/4/3/134358966/fuwivawotasaleganuga.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/hejggfb/flights_from_london_heathrow_to_santorini_greece.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5ffce4611c6a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382782/normal_5fe58e7c7631a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_60199512dabc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fanixagef.rf.gd/cable_gland_explosion_proof.pdfIn PDF document text
    • http://fogivezin.rf.gd/35186107394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea758ef8-b2c2-46f2-bf2b-d4107862f4b4/how_do_i_program_my_xfinity_voice_remote_to_my_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bcded90-215b-476f-89b4-4fbec697d14e/what_warriors_book_should_i_read_first.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33C 5428 bytes
SHA-256: a53d28870dac6c244e5fabf0e6ebc5356a9d0c31eb48085b7f6bf5007016768d
font_01_sfnt_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 11360 bytes
SHA-256: 96a554ef317820e2bb97e38f7a850da1d54b1b5ec712706fbd117f4eb7fcb45b
font_02_sfnt_off00011c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176