Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2574b0c12eca9b9…

MALICIOUS

PDF

75.7 KB Created: 2020-11-24 06:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 22fe844558e7ba91cb5648414bd8ca9c SHA-1: ea3ad6ef9a44c802c21184c44389e23f3a826996 SHA-256: e2574b0c12eca9b9c55e3ca5df34973c387cb26796f0936fc2fa5f72b9775ac2
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm or redirection strategy to obscure the ultimate malicious destination.

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
  • 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://traffmen.ru/123?utm_term=vernon+county+wi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454168/normal_5fa7701d706db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_5fbc367a614a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f9111329f667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473044/normal_5fbb734a1d777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5fa3207c4e7f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fa1ca111c69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5fa7c6a466c56.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/6018413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478131/normal_5fb941db88d17.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/vitelitubovuluj/vans_rv_12_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da62bbe-5ad4-4d4a-922c-0cf232c3c34b/10620599329.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/kenetrek_mountain_guide.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 6504 bytes
SHA-256: 5a43be2da4cf90b9681aad134b07ef336e543a86929e17be5826d9275b61dc4e
font_01_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 4532 bytes
SHA-256: 10edc04ad66adde895795eb801e8d53d53ddda9be65e5645d56a8e381be75366
font_02_sfnt_off0000fbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 11276 bytes
SHA-256: 4b0be25ceb044fa1e69b1ca8eaff57c0242c18cc1a3cbe5e447e08d823f116a6

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