Malicious PDF — malware analysis report

Static analysis result for SHA-256 460e3732ac3db72a…

MALICIOUS

PDF

83.2 KB Created: 2020-11-14 09:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: da0e6a3a1216b417507f46d7aa1af95f SHA-1: 078255bef8fe92d654829815b174e90e0e108f3c SHA-256: 460e3732ac3db72a2db9ca9b1b0a503147ddb8a3d9b2dc8319b96102bfe8d25b
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, and exhibits characteristics of a link farm. It contains numerous embedded URLs, with at least one identified as a malicious redirector. The document body is heavily obfuscated and appears to contain junk data, suggesting its primary purpose is to host these links rather than convey information.

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://traffine.ru/123?utm_term=wild+hog+breeds+in+texas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f892593a3488.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/birosagekuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466386/normal_5fab0daea64c0.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/febc7417-4899-4bbf-bbd4-c228212c55d2/jofenediku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8420be22-78f7-4029-9efd-e06918f04afd/xobidujonudaredibof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949997bf-b93a-4f74-9306-b53986487d81/40118369742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbba1af4-b9f2-454c-946f-feb9090de086/lojinuguzalapujawilezub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3177f7f8-efef-4f87-aff7-2441146320ac/roxuwipofamepopalarurojer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f88e04f-b384-459b-a134-dbd604fe2cba/dell_chromebook_13_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/46412719363.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/fotozepakusojibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6122180-ffc2-4519-a00f-9a123046985b/41424826478.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_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 5308 bytes
SHA-256: 55114af4a9abd0a78ec290835ca5ca9a576eb59413a187a1db016dcd4deb145f
font_01_sfnt_off0001172c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172C 12844 bytes
SHA-256: 48c216a5f4d1280488db30e50089c09fc069bf9380a280d9345c401ffdf97a6a

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