Malicious PDF — malware analysis report

Static analysis result for SHA-256 4467b00888f70d96…

MALICIOUS

PDF

74.7 KB Created: 2021-01-14 19:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 56e4f9c268649f952e49ede45f4fbb47 SHA-1: c9da6817d88f402ad67b67d0e58f820f7fc4460e SHA-256: 4467b00888f70d9684d0b4549701078f8dd51837ed6ccdefab364729eddc7109
156 Risk Score

Malware Insights

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

The file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

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://traffset.ru/123?utm_term=disgaea+item+specialists+guide PDF link annotation
    • https://cdn.sqhk.co/refowofiros/sKLCThb/football_world_cup_1990_teams.pdfIn PDF document text
    • https://cdn.sqhk.co/tokexinolelu/tiaIege/pajosekegojojibilit.pdfIn PDF document text
    • https://site-1166674.mozfiles.com/files/1166674/52209685354.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/iejggCS/48863546758.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/22480254309.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/YmyMiGN/sikepemujago.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/4912801.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/ijCWgcL/game_summoners_war.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/niwotipugonuvoz/adventure_games_for_iphone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/mixidedadorep.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/durasukememusevube.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/christ_college_school_uniform.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_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5296 bytes
SHA-256: c6f55e22e60dacb8d17a921b8b3f110bb169e1fcb7ca6003b6dfb22fb1eaaad4
font_01_sfnt_off0000f8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 11036 bytes
SHA-256: 07b6176b6cefa42d6dbd221eed55994351e9cf213470dd75ccd31ba97764b26d

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