Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3d545d17c59087…

MALICIOUS

PDF

67.5 KB Created: 2020-12-16 19:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 7c0a23f8eccd50e2207e90c7f176f835 SHA-1: 92b6a67b39704f129c3c9f0ee065dae42935e849 SHA-256: ad3d545d17c590871cbf81f6be0cc00d918cd25164c8efb8e8bfd981ec496e33
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=webassign+calculus+1+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473410/normal_5fd1b6b82ee66.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/gitibolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470408/normal_5fb33ed3df406.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/6348544.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/rasinidozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f985057d35d8.pdfIn PDF document text
    • https://xikalevu.weebly.com/uploads/1/3/4/3/134319979/desemafesazizafusax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2aa5268612547ed696d4d/t/5fc54f507acac6192a7165e8/1606766420179/5721783325.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce92ed5595ba03ff1ebbd0/t/5fd1e666d97b572b89dce185/1607591527275/posokisulu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f6c4c30a162e0c6c87f2/t/5fd74ee6e5ac5828963ece1e/1607945959369/transfer_data_from_iphone_backup_to_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc0eac2173fb5383bc33b4b/1606478531069/guitar_hero_ps3_guitar_on_ps4.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17ddbf9866f3fd2d885d9/t/5fc34e64e18c5c478e658472/1606635109468/senuraxigilitud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf55e74e98326c020787eb/1606374891713/17097821310.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36737bdb33045eed226b2/t/5fc415d41972c46e3c1d834e/1606686164749/vertical_structure_of_the_atmosphere_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/1254985102.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_off0000cad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD7 5428 bytes
SHA-256: 3f4ad403eeedb3dac85090180c30c5539ccecad578c031493e62f02e7c7d20d6
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 10540 bytes
SHA-256: 001df12362bbbdf03fc37b654d9c481b908154e0cc9e32b3539afb607357f460

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