Malicious PDF — malware analysis report

Static analysis result for SHA-256 3456af26dfe3f605…

MALICIOUS

PDF

93.3 KB Created: 2020-12-05 14:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1e52ba3f534c622bcbef99492c7ddf80 SHA-1: b3ddff4e8644e0c5b6b8b67cb96fdcddd781b455 SHA-256: 3456af26dfe3f60524f954039043ea61231869123ee0f2394e069f196decda58
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 heuristic indicating it's a lure for free downloads, redirecting to an SEO redirector. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a suspicious domain, likely serving as the initial landing page for a phishing campaign.

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://traffnew.ru/123?utm_term=without+feathers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443823/normal_5fa097dd5bd56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_5f9a3b89dbc2a.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/boxujetanonikuv/7th_grade_math_final_exam_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a245c3-6210-4432-a2d5-6b83d40af5f5/demeruxesepos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50044e98326c02072dfa/1606373380851/susifid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf62d68bfc51861673f79/1606219309709/77364758929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6875fa82-379b-46dd-b447-dd111aaa6b16/23429522079.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fb3040f1034a5ca93bca/t/5fc81ce426a3037b432ee5f4/1606950118420/wujuraxamikenawafe.pdfIn PDF document text
    • https://s3.amazonaws.com/kafifawono/ariana_grande_touch_it_remix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff99d606-4768-47e0-8fa4-25e65e22dc02/acoustic_guitar_music_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ef76d5-7830-441d-bea0-de538840c1c3/vanity_of_human_wishes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f975bf71053ccb109642/t/5fc6cf1556cd4459b3a4c5b1/1606864662217/flight_drone_mars_simulator_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49396288-9daa-4f3a-9756-01993576a9f6/temporalidad_de_los_olmecas.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/joanna_wow_classic_leveling_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc586c20b6b03258f54b180/t/5fc655271972c46e3c7689d0/1606833447622/27058146819.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc7329ea038a451bce8d903/1606890148996/simple_sandbox_2_mod_apk.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_off00013027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13027 5108 bytes
SHA-256: 8a303fb9c10025db0d5677bdb82249fecdb5629363b304ee5ab6e392d2725c38
font_01_sfnt_off00014192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14192 11408 bytes
SHA-256: 6c2d46d3cd5997f85ade2332b0d210b0d2748cd43cede73a554b7bdc0b634357

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