Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba18dd19d2002baa…

MALICIOUS

PDF

67.3 KB Created: 2020-11-26 01:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da593dfc17b24341288115d903b1a460 SHA-1: d338e70897b07f91663c9a10c42f91731c4855b0 SHA-256: ba18dd19d2002baad341a4cda764bd353a57dd5823d20ebfad0a2f98092116ff
214 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure and a link farm, indicating an attempt to direct users to harmful sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit user curiosity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ggtraff.ru/strik?utm_term=apex+legends+launch+options+reddit
    • https://xidamosu.weebly.com/uploads/1/3/4/7/134707329/0a287c3f020a81.pdf
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/cf523700.pdf
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/gusuri.pdf
    • https://cdn-cms.f-static.net/uploads/4408599/normal_5fa84d77d4d9d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lanaladu/karovisizesu.pdf
    • https://uploads.strikinglycdn.com/files/cb8659a4-6212-463d-b87d-78b43a07c9ca/valentines_day_songs_tamil.pdf
    • https://uploads.strikinglycdn.com/files/ac8f4732-8bfe-4521-b67e-6db411f88938/paxovesexelavozudapega.pdf
    • https://uploads.strikinglycdn.com/files/10d9ec30-8a73-4316-8f39-8e4f3c9638e4/csa_a23.1-09.pdf
    • https://uploads.strikinglycdn.com/files/0683bfa8-8130-434d-8f72-0a26c85357ee/26789786119.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_off0000cab6.bin
67600dbc9be5437a5c31b4d26ccdff824f661c353240d729f9ccdf2c3461f455
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 5392 bytes
font_01_sfnt_off0000dd0c.bin
a7b2a740d08ac038bdff871b0cf76202077812647641afe01cfd2dbcb5e9687f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 10560 bytes