Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91379b14203e74e…

MALICIOUS

PDF

75.4 KB Created: 2021-01-21 19:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: def77b2f824ff21b92ff40e0f24b442c SHA-1: 9e6def185d0e878f0e53c4874747f86de8541187 SHA-256: b91379b14203e74e1d1d1b6fad470130657b6904802bf82d93873445a0f82849
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an external URI and an SEO redirector link pointing to 'https://traffnew.ru/123?utm_term=hot+wheels+stunt+track+driver', likely serving as a lure for users to download further malicious content. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=hot+wheels+stunt+track+driver PDF link annotation
    • https://cdn.sqhk.co/badaxiloru/2lm3QKR/mini_battlebots_kit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384832/normal_5ffd27597dbb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5fcd36df25d23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_5ff2825bc1cfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5fefd1a9b0afe.pdfIn PDF document text
    • https://cdn.sqhk.co/niwuruba/FicqNgh/29844534506.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/iie7AKF/47879407697.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/zamuriza/14312043452.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/bowemofukiwifoxuta.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/27531974618.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/island_records_label_guide.pdfIn PDF document text
    • http://puwodadivuxasaf.epizy.com/65715275077.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/capacitated_vehicle_routing_problem.pdfIn PDF document text
    • http://rebobimakefeli.epizy.com/bepanah_serial_song_ringtone_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/80981068785.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/rofumof.pdfIn PDF document text
    • http://ladorum.epizy.com/57708405730.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/introduction_naval_architecture.pdfIn PDF document text
    • http://xivivafin.rf.gd/nccn_breast_cancer_screening.pdfIn PDF document text
    • http://gajovab.epizy.com/bagman_arcade_android.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 5204 bytes
SHA-256: 00e56a8f6f46b6ac5bc640cc94b4600bce18def3977a2e2654867b7fac7379cf
font_01_sfnt_off0000f9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 10976 bytes
SHA-256: fc6a9c1be072f4e520bc27f5193d077b57714c8e4ae78a65a3c346c719961231

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