Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3a54f37764dee1…

MALICIOUS

PDF

71.8 KB Created: 2020-12-24 20:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f3d158b4cf57360a6acd6e595f5f839f SHA-1: e976a889e2197eee51f65503e1f80fd8c63e557a SHA-256: fc3a54f37764dee13bf99d621d9e3cfe1e98711bc266b9aa3464a802ffb75669
214 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to link farms and redirector infrastructure, indicating a phishing or traffic-generation scheme. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest the intent is to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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://gettraff.ru/aws?utm_term=love+death+robots+imdb+parents+guide In PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/es8Ajhz/race_for_the_galaxy_goals_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/ibhgevv/vorurujedosevozanoki.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/iBFjjja/greatest_hits_rock_70_80_90.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/jjw51hi/pamosamaj.pdfIn PDF document text
    • https://cdn.sqhk.co/sebudesusoj/gjjxiaU/siberian_tiger_facts_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/gdC8W1X/my_persian_cat_has_runny_eyes.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikifabaf/gvhgig9/n._o._v._a._legacy_2_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/cgfKjgS/venawevemebogaw.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/nupivevepuneze.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/wavunot/e_brochure_design_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/rubber_dam_punch_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/pijutoxibuve.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/17152965879.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_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 5484 bytes
SHA-256: 81671b826533f87e2e36c9ff994a02da47b1f6af881b7d000b35977d1101c098
font_01_sfnt_off0000ea20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 11496 bytes
SHA-256: 98dce488d05f3928005e72461ffb9d22bc691fe52ee375398d7121df3fa2bbb9

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