Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cccb991aa2eae9…

MALICIOUS

PDF

143.5 KB Created: 2020-11-13 10:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8207035757bbf282d43a82dc95e87c78 SHA-1: db809befae780137c564fca26d92f6595504f4ca SHA-256: 80cccb991aa2eae949530f0ca833619274139746b575f2faa37cca25c7eadf74
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to SEO redirectors designed to lure users to malicious sites. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of the file. No scripts were extracted, but the embedded URLs suggest a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/123?utm_term=malcolm+x+pdf+francais PDF link annotation
    • https://juziwujaxizeze.weebly.com/uploads/1/3/4/6/134685910/7bc279f76f.pdfIn PDF document text
    • https://somolepudurupe.weebly.com/uploads/1/3/4/3/134332146/2380878.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/355a562e-9cbd-4ee3-a69b-8233d9d16dec/81225872146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a259e94e-3375-4af9-9287-3126c2af4746/63915936782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8890e0-6164-4d06-9182-e51ee7e12b27/the_practice_of_statistics_4th_editi.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/8882413089.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/causative_exercises_1_bachillerato.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/77513089147.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/mametameravab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54d8ece-1ddd-4f77-b077-d9c3c5b2ecd5/jobopabosilejukegiju.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/momomolesipinux.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/zosawinewoxufinajobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6f94c7-1c66-4b8b-9cff-97a06a4d258e/kajejuromuri.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_off0001f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4F6 5376 bytes
SHA-256: 7da0fde4a952a5d82f4d07b8fc71106790957d267a5fd6d087825f5e71ff7130
font_01_sfnt_off0002073d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2073D 13748 bytes
SHA-256: ea958bb05ed3073b5f14b2b8183244b4b5c1de030a90cb655fe200cacaa640ca

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