Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ef4b5ae470bc3a…

MALICIOUS

PDF

83.1 KB Created: 2021-05-13 15:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c9fe3a88ce257e7ceac613b02dcdcde SHA-1: de2b4f43903b394b5fc33106de73492a7497ce19 SHA-256: 75ef4b5ae470bc3a238e3946b84d2bcae5961cd1c32a1afb94103bba5dc114bd
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 0.9998

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://maypoin.ru/strik?utm_term=batman+the+long+halloween+movie+imdb PDF link annotation
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/kodakezep_xorabevulu.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/sixaguxazadewo_witilanizisemo_pisewe_sagobajiruzasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fd3c9638e9bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_601df7b3a6e4e.pdfIn PDF document text
    • http://cheapkeys.site/3681509149ishgr.pdfIn PDF document text
    • http://gidaxajigim.22web.org/zikapo.pdfIn PDF document text
    • http://buwoworavo.22web.org/tamifodet.pdfIn PDF document text
    • http://litifafoj.iblogger.org/zikiriva.pdfIn PDF document text
    • https://bosazafaxaku.weebly.com/uploads/1/3/1/3/131383721/2736321b2f1b29d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_6035c16cf2fbd.pdfIn PDF document text
    • https://bizugejukuvav.weebly.com/uploads/1/3/4/3/134322279/e45890ce0cd5.pdfIn PDF document text
    • http://zanartcc.net/beowulf_full_movie_720ph3gii.pdfIn PDF document text
    • https://pedidifapa.weebly.com/uploads/1/3/0/8/130874671/bofolezudu_katuzujonipet_gafupusa_bizesavisol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc75d31-7ee0-47e1-b597-cb894495c557/lilikopogek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d011487f-59cb-4fc6-919a-1e9187569560/kitchenaid_professional_600_parts.pdfIn PDF document text
    • http://kozuwuwupoxofi.rf.gd/pathogenesis_of_acne_vulgaris.pdfIn PDF document text
    • http://fenutirumavilo.epizy.com/muwipejovafedulewebuguru.pdfIn PDF document text
    • http://wefulipov.epizy.com/75268121630.pdfIn PDF document text
    • http://larisakexifa.epizy.com/17395042870.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_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 5304 bytes
SHA-256: 1b122168db7447acd6ae1a160ab7c5569646d19e8b8e95bb56e46447ee9bbcd5
font_01_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 11044 bytes
SHA-256: 4b86bb08ccb0f843e64e95c8306379c63885ad8ff1972f0668ded06d172b969f

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