Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed71598f44b93c2f…

MALICIOUS

PDF

62.0 KB Created: 2020-11-10 09:15:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d417c2d071ccbe869f05a367be073049 SHA-1: 9cb561de7d6a66f223fc19efca66bca101ef8b45 SHA-256: ed71598f44b93c2f0f3ae8505ef4f4ea9173aab53e382c714864038a8293c4d9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. It contains an external URI and a redirector link that uses a keyword lure ('drawing gingerbread man outline fortnite') to entice users, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and heuristics point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://traffset.ru/aws?keyword=drawing+gingerbread+man+outline+fortnite PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5fa17c9c67bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5f8df320b3725.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/buxoparadazegu/partes_de_la_misa_explicada.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/39417823077.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/12843437657.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/71253494531.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/65572585241.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/words_with_double_letters_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/69814308056.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/central_america_map_blank.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 2

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_off0000b69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69A 5280 bytes
SHA-256: 95dc96c7ae992970a07b3f44a91f148f70f8f8139ab3bd960855122659ed14a8
font_01_sfnt_off0000c890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC890 10240 bytes
SHA-256: 8b723dafbcf0f4d9e15b82c37b4688b95fc303e8af0690dcabc560a0b31142b7

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