Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff96576c2440617…

MALICIOUS

PDF

67.1 KB Created: 2020-11-19 15:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 15dc5d55edcdafa6a3ab82c7883b1203 SHA-1: 1c40568f9b93ca22556851f5439424909fdfd383 SHA-256: 7ff96576c244061712dbc6974549404d7fd2249a132772b22a95c2635e192f7e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one pointing to 'trafficel.ru', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, appears to be a lure related to movie search terms, aiming to trick users into visiting the external link. No scripts were extracted, but the presence of multiple disposable domains and link farms indicates a coordinated effort to distribute 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/aws?utm_term=tinker+tailor+soldier+spy+imdb+parents+guide PDF link annotation
    • https://vepezifu.weebly.com/uploads/1/3/4/2/134265798/gijovumobage.pdfIn PDF document text
    • https://memupenenukef.weebly.com/uploads/1/3/4/5/134527104/4a96bb2.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/cf1ee66.pdfIn PDF document text
    • https://mefusinumobidal.weebly.com/uploads/1/3/4/6/134679396/5e08a777.pdfIn PDF document text
    • https://nugekowu.weebly.com/uploads/1/3/4/5/134587082/1258012.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/nuxigorozaxigufola.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/zaromurijajepepomazi.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/toliwudalamem/desarrollo_de_sistemas_de_la_informaci_c3_b3nt.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/arangetra_velai_movie_hd_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/21211678226.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/suzun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba9c713-1a0c-41d2-afe6-a5405359f35f/12750156774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06743a5c-0864-491d-a133-f9d9f004cfd5/lugogosurolo.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_off0000c605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC605 5532 bytes
SHA-256: d847d9679b037c014e4f18f90d98bde323e73877bcc4e77506e21cf82e4b9124
font_01_sfnt_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 10808 bytes
SHA-256: 98dc7b4f323cf44d9da63632686c80ce6513d9dfead8e3ee3e06746f6fe853fa

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