Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71001d47917d2b1…

MALICIOUS

PDF

67.4 KB Created: 2020-12-18 03:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e50202b604ecf287dd2b1a695363583e SHA-1: d12f9dd15ab46bcf33904deb024c28463d8f0873 SHA-256: f71001d47917d2b1f94875441f3e8d9a5d072289c9eb34d6ce236bd616ea34e1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://traffnew.ru/strik?utm_term=towelroot+apk+ultima+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408170/normal_5fad97462052d.pdfIn PDF document text
    • https://dujezipiver.weebly.com/uploads/1/3/4/6/134610991/malad.pdfIn PDF document text
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/ruxukuna_mudumajimamapu_tunojezajewi_dulibumevuz.pdfIn PDF document text
    • https://safikevobajegev.weebly.com/uploads/1/3/4/3/134352312/wuvumuketalawafine.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/boduxatavepe/literature_survey_report_format.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcea2be5c1f0677175513c4/t/5fd75b20ab1a676c72abe3e0/1607949089157/synthesis_report_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/ganekizej.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/css_formatter_plugin_for_notepad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51e57acac6192ab77868/1606373862472/my_hero_academia_english_dubbed_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/peavey_cs_800_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/jejokixigol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed012e537a05ef0936a0/t/5fc3573518e72e5fdb4286a2/1606637366841/parallelism_worksheet_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67172bdb33045eee820f7/t/5fc6f640a038a451bce0b433/1606874689214/vekibedaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3f9f8d-41d8-4d57-9572-6f757994d60a/basic_instructions_before_leaving_earth_shirt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6848973e-8fc4-4196-b586-07f30ea2bec3/vawijodobitirotubupeve.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_off0000c9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BC 5128 bytes
SHA-256: 5d5d35e4ae06c49c9b5e9424e095cdfedd3f16342966ba097d9e5a0242869449
font_01_sfnt_off0000db33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB33 11044 bytes
SHA-256: be5e75342942bf5dee13830d7ee5b169c832021cef7c4032f4ab78fecfa2c35b

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