Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0710a30c3d94fe…

MALICIOUS

PDF

75.7 KB Created: 2020-11-11 08:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aa9bc0e82e046cba6922d42f7a89bcd5 SHA-1: 6ea8c367765173800ffb114d92c79b2beba5119c SHA-256: 0d0710a30c3d94fe72fa0d9f977405b0fcfa4808870b794e600d6d5cc04e0b86
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely used as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=how+to+mirror+an+object+in+sketchup+2017 In PDF document text
    • https://vivenovexo.weebly.com/uploads/1/3/4/6/134695888/540cd7c3675.pdfIn PDF document text
    • https://gosawopidelogeb.weebly.com/uploads/1/3/4/7/134714887/7298865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5f91779471907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5f9f0303e7116.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/c899e713-fb06-44de-a96d-1ff38f6e00b0/xewezemudozoketotesamexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22ee2d7-d734-489f-97e8-9bfdd2a78aae/sports_head_tennis_championship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fc45d3-6d0c-4a37-b72f-c2b8f6176cb7/bilexosewinemavod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da89acc0-c383-4fb0-9f5e-0b54f2aa2f14/33953957892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78a562c-2e7d-4dd3-9b29-c048ab3194e8/genexaxusawusu.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/dragon_ball_xenoverse_2_dlc_pack_8.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2E 5880 bytes
SHA-256: 262f57556e2f7525c409794412a3ee39f66ff3a8c529a88ca8d8ec43c665ebb4
font_01_sfnt_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 2016 bytes
SHA-256: c1a7d60e1cb15dce4b4f481de151e7144ba20b661416367ef580956803eaa483
font_02_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 10640 bytes
SHA-256: 7a29da47a6ef5b3f31c059757f495d9c9c831a60bda97d29df5a63ee7aa010f3
font_03_sfnt_off00010c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C11 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06

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