Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ce0ba9236170b6…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 08:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31728635343cabdfb4a876992430b317 SHA-1: 513089ff622bfb2934e3ff092504156323ac25b8 SHA-256: b6ce0ba9236170b6700bac7f5898c4ce5e1472104b468e2dce3d6d79bb3f8d0a
196 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which are SEO-optimized and redirect to potentially malicious URLs. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a tactic to disguise malicious links as legitimate content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=definiciones+de+contabilidad+financiera+de+diferentes+autores PDF link annotation
    • https://cdn.sqhk.co/numiwufeguv/gfgcjgp/eric_church_new_song_some_of_it_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/epiijc0/bubble_pop_electric_cake_the_scran_line.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/fdW54li/forteller_forgotten_circles.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/icse_10th_exam_date_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/95875691610.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/4VEgvRm/200685017.pdfIn PDF document text
    • https://cdn.sqhk.co/moranunemuk/d7hhggk/23451255996.pdfIn PDF document text
    • https://cdn.sqhk.co/vitozogog/3rIIxuu/support_definition_biology.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/gmqjhtH/bonupevimo.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/towob.pdfIn PDF document text
    • https://gebawifu.weebly.com/uploads/1/3/1/4/131483167/wurilekosez.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/ygfghgf/donation_alert_on_live_stream_application.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/higcNRj/auxiliary_verb_file.pdfIn PDF document text
    • http://tisorojeta.iblogger.org/how_to_clean_kangen_machine_sd501.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/b2584e2e.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/35353919682.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/WIgfge6/mutidudiwesefonapolunupit.pdfIn PDF document text
    • https://cdn.sqhk.co/xarazoxege/AHijBuW/chrome_resume_after_network_error.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/jjifJie/veboxabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wedowif.rf.gd/wazogabawuf.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_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 5156 bytes
SHA-256: 5488e68dcbad6fc124cfaa9777c1545065339ed172b475c3f3505290649da985
font_01_sfnt_off0000fbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 11584 bytes
SHA-256: 835f32892c79884a5301ee5e10546fe58f74590459b19e9cc43f623f40a29088

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