Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd603c6697ff73c9…

MALICIOUS

PDF

68.1 KB Created: 2020-12-04 20:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b5a01deb14a04c84ce40c165f04be335 SHA-1: 13faf59b8e57509129b66a1941d6548f8111a467 SHA-256: cd603c6697ff73c99ec4a31d003be5afb0768f2155908b28a44c8b61aae36280
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://traffset.ru/square?utm_term=bloody+mary+harry+potter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5faf3ca545080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5f984677a6a96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f91b8067a3e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_5fb6c4c0b59ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_5fb7e5202edc0.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/nasitowinaxox.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/0e428c19-b460-4358-b16a-b4706579d0cf/93080565310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea7aeb9-8a62-4fa4-b93a-5d3bee11008b/maberenotab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb00e57a-6cb3-4d24-8469-49cc2cf2b35a/21220655466.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77f60d743eb434449881c/t/5fc9353c39c3d831296a6a4b/1607021884647/space_jam_jersey_dress.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc532e34347c7043ce2c/t/5fc15f68cb3e0f577182fef5/1606508393718/gikosarizeritixalagap.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf98968bfc51861678fb0/1606220170065/change_race_skyrim_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da76f196-75b7-4b9c-93e9-fa2d90ff1423/23586945234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a10d6a7-da9b-41d6-8b35-fdd224f79c74/mejiwabufizowitaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ef4913-07b1-47e2-a628-280ee6b864dc/jjrc_h31_manual.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_off0000cd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD82 5172 bytes
SHA-256: a0024e081e2e84ac237a8ce4b7079354a7c84c90625f9fa3fd9381808870d5e8
font_01_sfnt_off0000deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 10768 bytes
SHA-256: ce006009fd4286e22a505731eb7e25a826042d309706165100f56d18906cb5ed

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