Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f32914ef6dca8b…

MALICIOUS

PDF

68.0 KB Created: 2021-01-11 11:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a680aeef19078b953b468cd4d50926e6 SHA-1: e0120c4e97000945afd8fb18a313fce836e481db SHA-256: a2f32914ef6dca8b61335b049410f9b7a02e2b7fcd82cc9b4de2aba049b08943
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, including one pointing to 'trafffi.ru', suggests a phishing or SEO spam campaign. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to redirect users to potentially malicious content.

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/123?utm_term=rc+drag+racing+near+me PDF link annotation
    • https://site-1168049.mozfiles.com/files/1168049/28141138034.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/d6hohc4/apps_similar_to_monster_girl_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/jeigExF/95816940732.pdfIn PDF document text
    • https://nixofukotozawe.weebly.com/uploads/1/3/4/3/134313466/d6e141.pdfIn PDF document text
    • https://site-1172435.mozfiles.com/files/1172435/tibibadijemo.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/8tgFhdC/66592137915.pdfIn PDF document text
    • https://pibefugaradaxo.weebly.com/uploads/1/3/1/3/131398186/dinuliwexelo.pdfIn PDF document text
    • https://sarerudaguf.weebly.com/uploads/1/3/4/3/134373173/xuwed.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/dhgQ1gu/wiler.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/welanisowari/pabuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/88565981752.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/6072555299.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/lumorebovugatojegomo.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/unblocked_games_66_running_games.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/31610793098.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_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 5056 bytes
SHA-256: b7af09684a06d44eb346cbadf2e8702decb62eedca46b9831e33ab4f763e53b8
font_01_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 10724 bytes
SHA-256: 886a1fccc36e726f38d1c5bb4b6e0e099c55988b8fd357be91996c2e32ffd962

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