Malicious PDF — malware analysis report

Static analysis result for SHA-256 af74b44f6d381f34…

MALICIOUS

PDF

66.3 KB Created: 2020-11-18 02:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 22cbf3a9c48f98df4fff9ee461cd771a SHA-1: 7c2cc59ce1c450d4e413a2d56aa923f39079d423 SHA-256: af74b44f6d381f349bc675dca552783a02785e24cf531f7e1592e05c20890559
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://traffnew.ru/123?utm_term=pine+lane+elementary', which is likely used to distribute further malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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://traffnew.ru/123?utm_term=pine+lane+elementary PDF link annotation
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/vefote.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/jajepenebepuxabes.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/a5f5d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f875040062d4.pdfIn PDF document text
    • https://likojekiputisi.weebly.com/uploads/1/3/4/5/134576895/sebelovegewuw.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/fosagobomap/how_to_build_self_confidence_at_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934c6eb0-bcaa-4cda-8bd7-3134babf002d/don_t_starve_together_crock_pot_rec.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/microsoft_games_live_support.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/57792024721.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/sony_gtk-xb5_watts.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/59497263294.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/83612543712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d51f143-42b5-4f94-b637-b41b7067921a/mepoda.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_off0000c6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6ED 4756 bytes
SHA-256: e38ed6f8c5f028a9bffa61c005b77f0d8c3b41cc12c17d4c565a9233ba55c8b6
font_01_sfnt_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 11344 bytes
SHA-256: 3ecf47a52e6f337cfca2281726fa4a4bbfed1ec9a34ca75956704ff40d061ff4

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