Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ce47fd1ae3de19…

MALICIOUS

PDF

73.9 KB Created: 2021-03-10 02:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 128e8e0cf21e14fd0c976de256387321 SHA-1: f97a05fe9addb49627ec20b4ed393da4d1098a77 SHA-256: 91ce47fd1ae3de1983cb8b1e862f36897fc588dbc3b7e4f2fe79a9333c953d51
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The ML classifier and ClamAV also flagged this file as malicious. The primary malicious URL identified is https://bologen.ru/award?keyword=black+boy+analysis+pdf, which is likely used to distribute further payloads or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://bologen.ru/award?keyword=black+boy+analysis+pdf PDF link annotation
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/08340aed09f8.pdfIn PDF document text
    • http://getchambre.xyz/8205252912038ksb.pdfIn PDF document text
    • https://libuxokoxirafax.weebly.com/uploads/1/3/2/6/132695332/memaxa.pdfIn PDF document text
    • https://bobitakakafaze.weebly.com/uploads/1/3/5/2/135297082/6f72661dd.pdfIn PDF document text
    • http://899themes-demo.ru/zopopa2naf4.pdfIn PDF document text
    • https://givurubikuz.weebly.com/uploads/1/3/1/4/131482907/kugenidobime.pdfIn PDF document text
    • https://nozoxajomakod.weebly.com/uploads/1/3/5/3/135332829/joxevoxa_gofaxuloda.pdfIn PDF document text
    • http://keksik24.ru/lenedujanuvugubobujozsifwe.pdfIn PDF document text
    • http://verifedform.com/apuntes_examen_acceso_abogaciaw05h7.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/zuwosil/mathematics_dictionary_james.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/99288611124.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/how_to_use_the_nato_phonetic_alphabet.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/basha_tamil_movie_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69974052-54ff-4ef8-907a-eb2a0a88aa04/tevibomivadixutu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/kindle_for_pc_older_version.pdfIn PDF document text
    • http://durevitulo.rf.gd/wefusajozo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/belmont_parks_and_recreation_activity_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85bb6d6-ab9f-4384-be24-6747492de342/what_are_metric_system_measurements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4829c2b2-1024-4571-87a9-60d17f86561f/black_and_tan_dachshund_puppy_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f35a648-a4b8-47a1-bb0e-c8b2fc55c576/how_to_change_pump_belt_on_bissell_proheat.pdfIn PDF document text
    • http://xupanapil.epizy.com/opera_mini_browser_for_java_phone.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_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 5408 bytes
SHA-256: ec41c3d0fd994440d5d814b9734cf7d6fb97335dc250d4e69b064c7ac0777d4c
font_01_sfnt_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 9880 bytes
SHA-256: d04d26cfd89c3e744a4296bef83be5430ad24650a7a523ef4c44831c5076d03f