Malicious PDF — malware analysis report

Static analysis result for SHA-256 9458bffdedb1a746…

MALICIOUS

PDF

89.0 KB Created: 2020-12-23 08:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6171cbecf7f5b7101c67cffbb046e18d SHA-1: 726610fd8c3321d5c08383ae00022ed50b8db41c SHA-256: 9458bffdedb1a74669e34557da28f1eaf53c6080819cc1e20ec29748d9f762fa
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of distributing links to potentially harmful or deceptive content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=ffbe+war+of+the+visions+best+mr+units In PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/8fbb684b2ec.pdfIn PDF document text
    • https://sazagirisama.weebly.com/uploads/1/3/4/5/134585928/butugalox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f8b580aeaf6a.pdfIn PDF document text
    • https://jemijibiwozigep.weebly.com/uploads/1/3/4/8/134855884/kumiwunuzinokutuj.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/tonisefoteka/harbor_freight_manual_battery_charger.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdec2afff074777c984e23b/t/5fdf7b00a478394ebcb6f0d2/1608481536552/hollard_travel_insurance_application_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe004206394b41d6428050c/t/5fe0ad2b892c8943b0e30ed9/1608559918882/nuposirogevovubunili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94466b13-32bb-4e54-9b16-0bd35f1cc4a1/baby_animals_funny_memes_clean.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2be322e537a05ef1504ba/t/5fce7df886458902ebb959b6/1607368185127/11967874160.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7998c717a0f60c4044aef/t/5fcb7d81a3bc3d19152f36fb/1607171458231/exonerate_synonyms_merriam_webster.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 5220 bytes
SHA-256: 76e060719fe57949dd2cecc3dc90e12efa740853bf70adeaf02a132b1afdcce5
font_02_sfnt_off000110f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F9 2140 bytes
SHA-256: fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2
font_03_sfnt_off00011ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD3 11044 bytes
SHA-256: e1493b4ae2cd0e352701ed696bce22e28258cad430478c89d78179c9b2d265e3
font_04_sfnt_off00014100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14100 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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