Malicious PDF — malware analysis report

Static analysis result for SHA-256 9148541dce47d147…

MALICIOUS

PDF

70.3 KB Created: 2021-01-13 11:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 696016fdbcc07621b85c367021c701c4 SHA-1: 658f4f339a8b9b3d7864ff350cd29242ed644ffc SHA-256: 9148541dce47d14788b86f888028e80dda69e531338b9b98a1e57b0d67cf9ee3
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://traffset.ru/123?utm_term=unm+gallup+library+hours PDF link annotation
    • https://cdn.sqhk.co/kovixileta/jcEMjeT/65304903855.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/moxepuguwezebopi.pdfIn PDF document text
    • https://site-1174038.mozfiles.com/files/1174038/rush_rally_2_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ittF7ig/harvest_moon_one_world_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5f99721bb35db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5f979a378e4af.pdfIn PDF document text
    • https://setinedib.weebly.com/uploads/1/3/4/6/134684411/243444.pdfIn PDF document text
    • https://site-1178121.mozfiles.com/files/1178121/73957183230.pdfIn PDF document text
    • https://site-1190334.mozfiles.com/files/1190334/phase_10_splash_card_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422658/normal_5faa5b686e202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8828e0dfbc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5fb59be2b9d5d.pdfIn PDF document text
    • https://site-1225904.mozfiles.com/files/1225904/pomadaganugava.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/ziwuvijevo/7439477106.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/cerebriform_nevus_sebaceous.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_off0000d337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD337 5468 bytes
SHA-256: ea05a0a67b228388d438a30f023135b972b635109bd51b5c2ea907cb36dd180d
font_01_sfnt_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 11560 bytes
SHA-256: 45e2c220e0cf664ec7e7e779918311a824418e165e3eefe4746c4b262c4f084a

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