Malicious PDF — malware analysis report

Static analysis result for SHA-256 f096a267e308d08f…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 12:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9cc8f2d542b44e340997e2e63b42c5ea SHA-1: 2142cd2d8d1a356d7a4ca0ce3d9aae089d38e0dc SHA-256: f096a267e308d08fbcf87844a35188e9edabbed962370c5566af590501439332
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a 'PDF_MALICIOUS_REDIRECTOR_LINK' pointing to dafemum.ru and another for 'PDF_SEO_LINK_FARM' indicating a mass of external links. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the structure and link farm suggest an attempt to manipulate search engine results or redirect users to potentially malicious content, aligning with phishing or SEO spam tactics.

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
  • 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://dafemum.ru/strik?utm_term=ableton+live+vs+fl+studio+vs+pro+tools In PDF document text
    • https://mixasokuxorizu.weebly.com/uploads/1/3/4/7/134742222/699bc62d6c5a6.pdfIn PDF document text
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/pidakuvuliperidela.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/27736.pdfIn PDF document text
    • https://luzenesezenobo.weebly.com/uploads/1/3/5/3/135307250/a6da9dc4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_6066cbd68b2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_60502742ab962.pdfIn PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/6812081.pdfIn PDF document text
    • https://dujeranisijoku.weebly.com/uploads/1/3/0/7/130776063/4905780.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/nilafafakem/60209370958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02deb8fa-6390-40d6-a4bf-3f137ea03274/what_is_the_constant_r_in_the_ideal_gas_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ac7d20-b5b7-48fa-8789-1649726b7374/27855858236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba841a4-aef8-4802-b536-17ebf0eb7e25/vizio_vz043_universal_remote_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/rimowefe.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/botany_leveling_guide_50-_60.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/59608864868.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/tautomeric_form_of_cytosine.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/how_much_do_entertainment_lawyers_make_in_nyc.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_off0000e3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EE 4896 bytes
SHA-256: 1e15b411a1d2583468995943f926aab2e37a9517ffa6fd98407805ac95da673d
font_01_sfnt_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 10624 bytes
SHA-256: 29f0bae803ee4b2ec17ac2ddfb895db06d5f0afb4e404b860ed629b9cc9ed7f9
font_02_sfnt_off000118aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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