Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b9044dd9349115…

MALICIOUS

PDF

71.8 KB Created: 2020-11-26 03:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 94f3fa8cd0c028a04356f8b531770d64 SHA-1: d716ed8c9485a2768647c3e18cdb2eaf78d52a40 SHA-256: 80b9044dd9349115426865d3877c3f0176e03468addb9b644fc38fd8d3f93eac
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of external links, with one prominent URL pointing to 'trafffi.ru', suggesting a potential phishing lure or a link farm for SEO manipulation. The document body, though heavily obfuscated, references 'Football manager 2020 run faster', likely a lure to attract users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=football+manager+2020+run+faster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f8ea12e19389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fad97f71838a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415754/normal_5f95246ec0eba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fb968fab99d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f9618ecb8d1c.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/4460173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5fbab9d6c0ac7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ab80b0-90ee-416c-8e3e-1b489a0f4108/26140380436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927286bf-6b30-44de-9431-08044fd4bd4b/evaluation_nombre_decimaux_cm2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af44ff34-3fe3-40fc-aae1-f27f37b1daf6/12399814440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7de0013-052c-4d02-9b4a-03a3573b595d/bandit_base_id_skyrim.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/98799630120.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/idsa_guidelines_for_staph_aureus_bacteremia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b280c7-1f6a-4aee-b537-908cee784a44/11479409301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc1dec4-2c88-4c94-8747-b7f4f3c625fc/29040309859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc284d9e-4a74-4aa6-8a38-959275226a24/nazog.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_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 5456 bytes
SHA-256: efde03ddbb9a65fe09f95c5a6aa302b97c44044c1e62d04121472d8af5a85dd2
font_01_sfnt_off0000ef99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF99 10204 bytes
SHA-256: 1bbbfac556411f4821fa153cd5684829fa7df1aee4aac957eea8bba85d541d20

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