Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2fee52920eba77…

MALICIOUS

PDF

67.7 KB Created: 2021-01-04 15:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 117f55718a2d2d80194e00742d47eb15 SHA-1: a72519c6c4c72cc1afd652391ff61e1582af9699 SHA-256: 1e2fee52920eba77cc4dfea298b2589a691907619efdf76c69e90646d145b152
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious domain 'trafffe.ru' that is likely part of a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

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://trafffe.ru/wb?keyword=practical%20intelligence%20emotional%20intelligence%20and%20social%20intelligence PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5f9f2520b0c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_5fafeede7150b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_5fbba27e8acb0.pdfIn PDF document text
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/najetazo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5fe09afcaa438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_5fc25c3f9624e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fe6ccfbcd129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5fe6d5b286a4f.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/a6d8fb4b-dfc0-419f-a090-67af14ad5b64/41902893268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae11e122-8067-42e6-83ae-19f600e89346/wildscapes_mod_apk_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/361aefbf-aacb-4bbd-ace8-0fefa15e24d4/nuzipofajarimaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60dff84-1cf9-4890-9e6b-f79b1e3ad674/najixojax.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/benjamin_carson_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/62664548222.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_off0000cd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1B 5260 bytes
SHA-256: b779df7e79d8dfd25f6c8d5649b72f35d859f78733fd7b505f064cb20977a35d
font_01_sfnt_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 10124 bytes
SHA-256: 3ead681c11695e2aa408818e3cd5d8167ce7cac49adbed71f856fccac33f1aea

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