Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeec41754c04a2e3…

MALICIOUS

PDF

80.7 KB Created: 2021-05-17 08:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bc22603a45e3734e430756cb11bf244b SHA-1: 9d6a41ec8cfc29ea19e7a239448a0977a68ec618 SHA-256: eeec41754c04a2e3623b9011c55bd4fddae2dd6e8536e49cbe15c9a736c29c7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://xezojetit.ru/strik?utm_term=what+are+the+wild+dogs+in+australia+called PDF link annotation
    • http://apkweb.net/buddy_murphy_theme_song4tyzf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426080/normal_606e6499607d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_606a1c6dcfc5b.pdfIn PDF document text
    • http://tiktokhd.design/mapa_mundi_em_portuguesd9mhe.pdfIn PDF document text
    • http://regvoolkim.website/compare_and_contrast_essay_structure_examplem59xm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5fd9530e19956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_603df4465221b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491451/normal_60555817be133.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/89424828116xofxh.pdfIn PDF document text
    • http://gazuravalo.iblogger.org/94163055752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fe5fe7b475e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_606337209b637.pdfIn PDF document text
    • http://notdull-eng.online/547429445888omwu.pdfIn PDF document text
    • http://wildboost.club/55282119245feqk1.pdfIn PDF document text
    • http://swiss-gear-top.xyz/how_to_draw_a_nose_from_the_side_easyu6dor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_5fdb53b09f4a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390068/normal_5fc694486f635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5fd99f1499bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_60468e1c6f3d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levologujarobe.rf.gd/vavimewezuku.pdfIn PDF document text
    • http://rewifavad.epizy.com/channelling_my_spirit_guide.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_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 5304 bytes
SHA-256: 61829103893c613de85bc599ae31c26bc4c21130bf9dbfb836ed6ae53cf627d2
font_01_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 11140 bytes
SHA-256: 1bf4d057ef65268dc65802a1cfad9e6c2c5066c87de7950cccb68d920851bbbb

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