Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dab679c4707f28…

MALICIOUS

PDF

70.6 KB Created: 2021-02-07 05:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7b31483dcded1f81efc5c3a11fbfdb00 SHA-1: fd3a7e7b93134420e75119d756e1a901de128d27 SHA-256: a6dab679c4707f28efd0125dc9a94914368575d99d380a8fd7d304a3c01a6583
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-confidence heuristic firing for a redirector link, specifically identified as an 'Image lure linking to an SEO redirector (free-download phishing)'. This indicates the document's primary purpose is to trick users into clicking a link that leads to malicious content. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to facilitate the download of a second-stage payload.

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
  • 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/123?utm_term=oxidation+of+alcohols+to+aldehydes+and+ketones PDF link annotation
    • http://mini-cam1.club/gojexukigavibivewufunotanvc092.pdfIn PDF document text
    • http://datinge.site/livros_de_culinaria_em_gratisaqi6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fdeb021856a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491155/normal_60065ed1650d0.pdfIn PDF document text
    • http://labiosdewonda.com/Kubnske_detsk_prbehyk2t39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5fe98ef14d9bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5fe70bc225d06.pdfIn PDF document text
    • http://bunnygummy.ru/dizisemy99f.pdfIn PDF document text
    • http://copyright-helps-team.com/wajamowupedelxaf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_60129ab6beae4.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/wifiduxezo/96824074658.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/4794493354.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/vehicle_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/potedofobifafogiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/tvu_anywhere_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/98471058324.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/tudazozarinawizelazavum.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_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 5276 bytes
SHA-256: 3fbfea3656dfeb73902071ecc10f779c313b0d01ee497866db71ec26335c69e2
font_01_sfnt_off0000e76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 11048 bytes
SHA-256: e7169005161ef28da586e24bd64baeda01142c09dcb45877855048a729a2acf0

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