Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad717b96abb1191…

MALICIOUS

PDF

72.4 KB Created: 2021-03-01 03:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 08afb4071c61fe69aba3ebbe531f4d30 SHA-1: a53dbbe1f5d4a5b1b026bc93d5706d0dd309c360 SHA-256: 3ad717b96abb1191771cf4f2b00f30691bd7b90075528002692589b240db4df9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary focus on 'https://xezojetit.ru/wix?keyword=difference+between+photosynthesis+and+cellular+respiration', suggesting a phishing or malware distribution lure. The document body, though truncated and obfuscated, appears to be a distraction, likely to mask the malicious links.

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://xezojetit.ru/wix?keyword=difference+between+photosynthesis+and+cellular+respiration PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475577/normal_5ff3c470c8ebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453734/normal_5fc66fe59d9b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_6009bcd14e404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5fd746ffaf57f.pdfIn PDF document text
    • https://texexodova.weebly.com/uploads/1/3/0/9/130970004/eb995c317b.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/mirukolikiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_601b3f27dd80a.pdfIn PDF document text
    • https://nipujari.weebly.com/uploads/1/3/1/3/131384055/3147688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493881/normal_6012624414033.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/jinadotaboxisinumodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_600aab5b4da21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5fd621a7dce09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulegezusaz.epizy.com/little_fires_everywhere_cast_episode_1.pdfIn PDF document text
    • http://puvidideja.rf.gd/topiz.pdfIn PDF document text
    • http://duzivokerogiva.epizy.com/cyberpunk_2077_ps4_requirements.pdfIn PDF document text
    • http://jimagonekitop.epizy.com/rowusajadilopasig.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_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 5576 bytes
SHA-256: a7c66c190726cc66dcd895e7860bd314771d73a7cca6a6b03695ec20cf1a3600
font_01_sfnt_off0000f249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 9936 bytes
SHA-256: dcc1a67c5341ddc68c2daa4843f542d1b405d944898f6f631ae6e25cbc1d5488

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