Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c13575a447830b6…

MALICIOUS

PDF

610.8 KB Created: 2021-03-20 20:29:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9cf95e8155e0850717970c12aad0da45 SHA-1: 2fc8336d78ac2565ac7ba6328cf82f92297b7d39 SHA-256: 6c13575a447830b60a09b8177e7b11bb2a3efaa81c118403ec1150185552b915
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and ML classifiers, with heuristics indicating it's a PDF phishing lure using an SEO redirector. The embedded URLs, such as 'https://golowaki.ru/aws?utm_term=book+of+pook+pdf+drive', suggest a deceptive download attempt. Although no scripts were explicitly extracted, the PDF structure and associated URLs strongly indicate a phishing or malware distribution vector, likely involving a malicious second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7276

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
  • 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://golowaki.ru/aws?utm_term=book+of+pook+pdf+drive PDF link annotation
    • https://cdn.sqhk.co/wowixepis/phgiai8/red_robin_bird_costume.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/misusudujevuzaneram.pdfIn PDF document text
    • http://vutunema.mypressonline.com/ravevuxomu.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/248234290.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/how_to_replace_weber_spirit_igniter.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/customer_services_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/fywLUOi/gonakawife.pdfIn PDF document text
    • https://cdn.sqhk.co/guzupewad/fMBiTAC/face_masks_for_sale_near_me_disposable.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/census_data_by_zip_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419849/normal_6041ec9f83fd8.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/how_to_pair_my_bluetooth_headphones_to_my_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/cagjCih/live4_gopro_instagram.pdfIn PDF document text
    • http://walawatomu.mywebcommunity.org/jitibagaluxomol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446273/normal_5ffd6848ca598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8064bd6d-a7a5-496d-aecc-0ca25d0f5617/the_mortal_instruments_city_of_fallen_angels_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87785f5-8a5c-404f-b0d4-92f6b713e78c/detapixalepuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85b4c21-5722-4f11-abd8-4f74b0eac42f/how_to_build_a_resume_writing_business.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 5

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_off00093fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FCD 4788 bytes
SHA-256: 0c3ec68e82545b0bd3a2bcae1a8648e846e2ff863a854d0734f9a456e097ffbd
font_01_sfnt_off00095043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95043 12276 bytes
SHA-256: 61551292ca607698b02c6ef01485fbf57932d9dcbfafa607632dfc153dba9887

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