Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a16e4b9c336ebf5…

MALICIOUS

PDF

90.8 KB Created: 2021-01-10 09:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3e4ce7ddf625759c909439aebb6e501 SHA-1: d0a2804ddf85e83b3628f478531742cbfc6950b6 SHA-256: 3a16e4b9c336ebf5282230067f273449280fcb0237d0c17b4de6ef3d9204bbe2
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a high-confidence ML classification. The document contains a large number of embedded URLs, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=jrotc+jums+manual
    • https://cdn.sqhk.co/vipatemeluti/TjdjiIg/xalebibateri.pdf
    • https://kokujilu.weebly.com/uploads/1/3/1/4/131453241/xuruj-sutuxipavitet.pdf
    • https://cdn.sqhk.co/josozudibud/jbtjhha/67360034082.pdf
    • https://cdn.sqhk.co/duvapegoleva/jcjjihj/national_football_team_manager_salary.pdf
    • https://cdn.sqhk.co/xubuguxovim/h8iihgG/87568778916.pdf
    • https://zodukoweferu.weebly.com/uploads/1/3/1/0/131069906/batatokufabi.pdf
    • https://kogejuxo.weebly.com/uploads/1/3/1/6/131606118/00b4d0e6.pdf
    • https://site-1177600.mozfiles.com/files/1177600/14526372429.pdf
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/gopugojudubujexomovi.pdf
    • https://tanorejenajid.weebly.com/uploads/1/3/1/0/131071151/nexefuwazi.pdf
    • https://merebidoso.weebly.com/uploads/1/3/4/3/134344951/lubosiriru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ligole/ccpa_full_form_in_india.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129a2.bin
114478612533a7ab9cdd1e1d9fdd513b7dad6f315a7cd8c6caa3fd36341d8685
pdf-font-stream PDF embedded font (sfnt) at offset 0x129A2 5008 bytes
font_01_sfnt_off00013a90.bin
73666ee865314c48553f4f80e2935ec0bc4109108ebe7e8e6d0523a699a8aafb
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A90 10588 bytes