Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9c9f6f2e4caca7…

MALICIOUS

PDF

74.2 KB Created: 2021-01-18 14:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7d04e58f6e4514eadb480ba41db90095 SHA-1: 09e425687df1a96cd0af807fe369a8eff53a52c1 SHA-256: 7d9c9f6f2e4caca784ef6cd5230cbcfac4f12ad31015cd18e256b2e3ce8b64f6
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, further supporting this assessment. No scripts were extracted, but the presence of external URIs and the overall structure point towards an attempt to redirect users to 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/123?utm_term=twelfth+night+characters+sparknotes PDF link annotation
    • https://cdn.sqhk.co/fumamimed/SZVhcie/plants_vs_zombies_xmas_download_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/Nifghji/dead_agents_on_ncis.pdfIn PDF document text
    • https://nugibunexediga.weebly.com/uploads/1/3/0/7/130740514/tuwemoritisugilikuse.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/cjdhgwL/vepokirirepi.pdfIn PDF document text
    • https://mafidusat.weebly.com/uploads/1/3/4/1/134109097/2636135.pdfIn PDF document text
    • http://bepevekebezupu.22web.org/19929947508.pdfIn PDF document text
    • https://muxalogedidu.weebly.com/uploads/1/3/4/3/134358485/49abbebb2270.pdfIn PDF document text
    • https://site-1181732.mozfiles.com/files/1181732/junepagukopit.pdfIn PDF document text
    • http://vafakewa.iblogger.org/body_parts_vocabulary_worksheet.pdfIn PDF document text
    • https://site-1251700.mozfiles.com/files/1251700/catalytic_hydrogenation_lab_report.pdfIn PDF document text
    • https://site-1176181.mozfiles.com/files/1176181/revir.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/vewapuxusaraje_wadidadojez_fenepi.pdfIn PDF document text
    • http://domifonupesif.iblogger.org/jipibi.pdfIn PDF document text
    • http://davofaso.22web.org/adobe_reader_concatenate_files.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kirigawegugava.epizy.com/nenudazilemejafawabo.pdfIn PDF document text
    • http://loratozojakin.epizy.com/13952313989.pdfIn PDF document text
    • http://vidojizo.rf.gd/katedra_geoinformatika_upol.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_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 5380 bytes
SHA-256: 7f149e372c9633e91c5312e493c9b06a70c777c1fb20b93b6004201fb6183818
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 10048 bytes
SHA-256: cabc0e4355c9baa3ced51819d6dd1be7c0c7a33a57dc5a90a971924bae9bea29

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