Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99d7e5163828bc5…

MALICIOUS

PDF

71.6 KB Created: 2020-11-18 21:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfbc4dad6ca2a551d24eb78d3215f110 SHA-1: 9e5b09a706638360b7f576473820fdbd0914aed8 SHA-256: e99d7e5163828bc5da44d14750bb4e6a4af6636e7d2fa5c89a049d61bc72c484
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, including one pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The document body, though partially garbled, indicates a lure related to 'Skyrim mods', which is a common tactic to entice users to click malicious links. The high ML score and ClamAV detection further support its malicious nature.

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://traffnew.ru/123?utm_term=how+to+install+skyrim+mods+manually+windows+10
    • https://fisolaxarod.weebly.com/uploads/1/3/4/4/134471724/4821237.pdf
    • https://cdn-cms.f-static.net/uploads/4423431/normal_5f9f8ba90fea8.pdf
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5fa5c07480dba.pdf
    • https://pezitojuxesuvog.weebly.com/uploads/1/3/4/6/134608136/ribatujida.pdf
    • https://fimuxexepal.weebly.com/uploads/1/3/4/6/134615427/jemarobedasuvafawed.pdf
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5fb373f4d2b7e.pdf
    • https://pefobasor.weebly.com/uploads/1/3/4/1/134131397/7533304.pdf
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5f9ac4847a5e6.pdf
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/rezovovob.pdf
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/99a5161d5886c8.pdf
    • https://xekijepomi.weebly.com/uploads/1/3/4/5/134508866/zegovem-jozinadez-biwiwupel-tomemo.pdf
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/napoledunadigo/tajir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db05.bin
1daf398c19d8149d7ffad95490f744c675517942e8484b6f9c81854c0d31a3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 5384 bytes
font_01_sfnt_off0000ed52.bin
ea46c5132cce6dc0be6862161731cdd987d3fe20547df86362222309fe042d38
pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 10568 bytes