Malicious PDF — malware analysis report

Static analysis result for SHA-256 9057511d80892925…

MALICIOUS

PDF

70.5 KB Created: 2021-02-16 13:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 26b57dd31f25d21b0afcaf789240f0f5 SHA-1: e790071ee4ddc980a34fad9ebe88b2822f468ba8 SHA-256: 9057511d8089292508060ffd19f56568f3a342bef8dd7cd21fd977c99eda992d
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 0.9998

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://baarspo.ru/wix?keyword=dead+zed+1.1.1+mod+apk PDF link annotation
    • https://cdn.sqhk.co/webuzifinuno/15ojchj/ruxaxefexagitixep.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/mgfjfjc/xerotikugajizitebaxaxifap.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/2045692.pdfIn PDF document text
    • http://liketime.fun/ink_master_hosts7g80a.pdfIn PDF document text
    • http://winoorama.space/aamir_khan_movie_talaash_songwe2ha.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/hfBdgc6/kurugifexanig.pdfIn PDF document text
    • http://goodik.fun/buvoxemipoforiwpnhp.pdfIn PDF document text
    • https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/rakaruxarebof.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/muzozuwukide.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/a4955.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/tetofamuxulil/buccal_midazolam_nice_guidelines.pdfIn PDF document text
    • http://lejipuzab.epizy.com/bumblebee_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/30255228063.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_off0000da8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8D 4996 bytes
SHA-256: aad6f44bbeb6381cbaa2066a4ecad990c77e6a73e6712e5d8327a7fd124ae5e1
font_01_sfnt_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 9820 bytes
SHA-256: 2db3552073615baac81ddadc3b72593520ef9f09502a016724813cd3f4d6bb2b

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