Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c2f8d51cce200f…

MALICIOUS

PDF

77.4 KB Created: 2021-02-15 05:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8f102b273fecbf654ab88fe244edd59b SHA-1: 4c2db0fdd67102f4eb7abfd45795529ad3acd2fe SHA-256: 20c2f8d51cce200f8f4ef24ffd395528f70909de75fc0d57238e8939bc9a3066
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious domain ('druttle.ru') and another to a Weebly subdomain hosting a PDF. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The PDF structure suggests it's part of a link farm designed to drive traffic to potentially malicious sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wix?keyword=digimon+world+championship+digivolve+guide PDF link annotation
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/zuretafakelatizat.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/gapewawisotoxumuvojo.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/mafidevekafax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369646/normal_5fe0d77c175a7.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/4531c1f90d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412380/normal_5ff480dfa0fdf.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/759896.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/gajumamuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493201/normal_5ffe89498bbf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_6023fb19646c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5fe51eb1c4829.pdfIn PDF document text
    • https://pizizidoto.weebly.com/uploads/1/3/0/8/130873839/6351919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376357/normal_5ffb3d7cd6a5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xutomoxu/new_england_patriots_injury_report_super_bowl.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/cuestionario_de_afrontamiento_del_estrs_cae.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/angina_management_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/dark_souls_ashes_of_ariandel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/compendiu_de_chimie_anorganica.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/i_cavalieri_dello_zodiaco_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/kindle_reader_for_windows_8_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 5440 bytes
SHA-256: 2a17b558ab2f53912e4f48366cb2a8ce6eabd77715df9105f85d1fb4a0656f0f
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 11040 bytes
SHA-256: af368856452c82bfb6fe10d8ef23bb88a7362191a03bb3932212ef469241fdc3
font_02_sfnt_off00011987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11987 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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