Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b26b66634ad093…

MALICIOUS

PDF

73.5 KB Created: 2021-02-25 23:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b5683c6b4e6d7da5d80faee1c742e40b SHA-1: b23111f4fc1c672c6a8e99b66553de90643b78f2 SHA-256: 91b26b66634ad0937064001b7d45a8a5b432c225b6b7254bcb687c35a018e89f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains and acting as a link farm, a common tactic for distributing malicious content or conducting phishing campaigns. The presence of external URIs and the overall structure suggest an attempt to redirect users to potentially harmful sites.

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 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://seumenha.ru/123?utm_term=html5+text+input+attributes PDF link annotation
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/pofinekinapemel.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/ii0jfhh/jumpstart_definition_synonym.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/Ujeihjb/online_mobile_recharge_with_amazon_pay.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/buvif_fejen_ladojexufebima.pdfIn PDF document text
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/pemipebexawewu.pdfIn PDF document text
    • http://mutugupepu.iblogger.org/canon_g3000_printer_driver_for_mac.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/d8755012786.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/bogeCgh/xorijewurulusupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogufujupi.rf.gd/anime_slayer_ipa.pdfIn PDF document text
    • http://muxolisakij.epizy.com/16831850593.pdfIn PDF document text
    • http://bumosutu.rf.gd/how_to_update_fiio_x1_2nd_gen_firmware.pdfIn PDF document text
    • http://piredesoki.epizy.com/70652544612.pdfIn PDF document text
    • http://gefutikavuza.epizy.com/avengers_cartoon_movie_in_tamil.pdfIn PDF document text
    • http://nupejodolet.epizy.com/97013300340.pdfIn PDF document text
    • http://baromar.epizy.com/safisulumapijoro.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_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 5256 bytes
SHA-256: 0bd5009b02d25d3941777a90cdd5225f31dde89be724b6b1f1161085b4a3cd5e
font_01_sfnt_off0000f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 10960 bytes
SHA-256: 71e0d917f12db587a4e8786fc2ac6ad6ba70931504827884bebbf2a58fd1c1a3

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