Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e43f8cf2dca311…

MALICIOUS

PDF

85.3 KB Created: 2021-01-08 19:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc52c44bf745df97fce3992377c839e4 SHA-1: dcad29b6682cc0b4d2c467b42493765c408797e4 SHA-256: 33e43f8cf2dca311eb903b5e687c577eed3761d6ed3675d07acd7e6ab62233b4
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many pointing to what appear to be SEO-optimized PDF files, suggesting a link farm or phishing lure. The presence of a redirector URL and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=c%252B%252B+math.h+pow PDF link annotation
    • https://s3.amazonaws.com/fakuguvil/fevawawuniloxixataravewet.pdfIn PDF document text
    • https://cdn.sqhk.co/bazopaxepifu/VREiije/rorukoxi.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/diledikod.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/qihvibd/star_trek_premium_pinball_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/80001336517.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/rupusizijivoguvapifarug.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/81444c97-e733-47e8-a7a4-45da5b447529/83299466096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bb4c48-9e46-464a-aef7-3b6cdbc82034/netuzakanifudijoneluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be00e7d5-4dd3-455f-8508-873e0669217c/how_to_prescribe_insulin_dosage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4074e3b-afbe-41d1-b3b0-1d190db6142f/carpet_rc_car_tracks_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1071554a-e144-4468-b846-3829042ecb2f/31913704249.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC38 12316 bytes
SHA-256: ee967d0753b2d2a4adac8653f626fc35aa0f6825758fca4093f1b33b6e1af134
font_01_sfnt_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 4780 bytes
SHA-256: debf058372f33374e76d91dbb56f8fecfd23fde37203e59ec47be985412db434
font_02_sfnt_off000103c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C5 14416 bytes
SHA-256: 2d08be51284d9de5c5b28e69c28089aab3519a2b5674886b00af3f1af31a9575
font_03_sfnt_off000132fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FE 16132 bytes
SHA-256: 06d84a79787f49517cba9647d12dd77c675544b9e46e70dbd0c3ec2b8d2a160e

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