Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a28bd7a6c27d39…

MALICIOUS

PDF

73.7 KB Created: 2021-02-25 23:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cc93673af5d72d76642b10fef76e0eb9 SHA-1: 636c3d2e5b0925a8406cd64cddb21f69dc67e716 SHA-256: 92a28bd7a6c27d397abe781279b5ae39a95bc9f1863c667f9d3f34567660057a
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://maypoin.ru/123?utm_term=what%2527s+another+word+for+okay PDF link annotation
    • https://cdn.sqhk.co/vujaderaz/ahdhhBP/jilevu.pdfIn PDF document text
    • http://shoop-fh.ru/97096526506ytdmf.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/64040816604.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/jhnhaxC/wartide_heroes_of_atlantis.pdfIn PDF document text
    • https://cdn.sqhk.co/nudavede/Uifhchh/dragon_eternity_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/Licicha/moweb.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/heZWiis/21234706700.pdfIn PDF document text
    • http://sks-expertiza.ru/bible_verses_for_youth9616c.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/e871fii/pagevabarulupizijumamo.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/7heDNHh/how_to_import_rosters_into_madden_20.pdfIn PDF document text
    • http://iwhite.space/pururironegari1q7t.pdfIn PDF document text
    • http://present-mag.ru/ice_hockey_dallas_stars2z1c7.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/xavuvimonoximefonodup.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/serogajugomiji/domus_aurea_visite_guidee.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/tasoji.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 5268 bytes
SHA-256: 13a59e15b3b3250e8ef3c68c23a859a6575ab20d3d04b4d2f13085dd12a9383e
font_01_sfnt_off0000f654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF654 10572 bytes
SHA-256: 2d165b3ad7fda3dce58a8e8d113d8fabc8f0347e3c9e210d81be4b2d927c4b3d

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