Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf2adfb32a4e2e4…

MALICIOUS

PDF

75.8 KB Created: 2021-04-21 19:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f301835f5ec32c64702686232ffc7510 SHA-1: 73ebf6ddc7859e2bdd0711364841759cde4528e8 SHA-256: fcf2adfb32a4e2e48318050da8cc8e45c297113b37cab2104d9bbbbdba08cde9
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 ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of an external URI and an SEO redirector link, suggesting a phishing lure for a free download. The document body, though heavily obfuscated, contains text related to 'intestinal motility disorder' and application metadata, likely part of the deceptive content.

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://baarspo.ru/strik?utm_term=what+causes+intestinal+motility+disorder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450140/normal_605b641e74311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_60192e29d90ee.pdfIn PDF document text
    • http://razixir.22web.org/geometric_design_guide_for_canadian_roads_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484107/normal_5fefd12cb36cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_60001602c2235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_604f619bf36a4.pdfIn PDF document text
    • http://ruwegekugite.22web.org/90899758186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_602e004b3496e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5ffef7e35ea73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477373/normal_5ff504a5b96f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458622/normal_5fc735cab4599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_5fd74321534f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451954/normal_5ff085cde9cd4.pdfIn PDF document text
    • http://noniteziduvi.iblogger.org/78929919867.pdfIn PDF document text
    • http://xadukododefisev.22web.org/30507820099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://polexusuzoxofiw.epizy.com/54524718075.pdfIn PDF document text
    • http://sikamavidasatam.epizy.com/28468776983.pdfIn PDF document text
    • http://lomurobutu.epizy.com/jurassic_park_builder_hack_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352259db-2b44-4e2d-80a4-2242da1312a2/metodologia_dela_investigacion_sampieri_3ra_edicion_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecdae5ce-b112-4e2e-b0b0-cab485ab2b06/vofurarapivixu.pdfIn PDF document text
    • http://lotijedopedo.epizy.com/bunasumevi.pdfIn PDF document text
    • http://lenamopotinapar.epizy.com/renaissance_francaise.pdfIn PDF document text
    • http://jafuwada.rf.gd/how_to_use_celestron_astromaster_114az.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_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 5292 bytes
SHA-256: b3177209c892f8759d35786cc11ce5ffd2a5a379049dcbdf61d4eff484c24823
font_01_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 10764 bytes
SHA-256: 4c7c1b744dee8b67ee00c073fb7a47d702a6973c5fe2d97d4ba0c6441328c06e

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