Malicious PDF — malware analysis report

Static analysis result for SHA-256 03614fd33a789443…

MALICIOUS

PDF

60.5 KB Created: 2020-11-11 04:15:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7121a2222e315baacb0a134dee33322 SHA-1: 11805166ea8383dd18974419804bfd8495d135bd SHA-256: 03614fd33a7894437577f84b5369c5b8aa73e3cdb7f930e9ba54c5db8fccd51a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The presence of embedded links suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?keyword=money+a+user+s+guide+laura+whateley+pdf
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5fa5d554d0069.pdf
    • https://cdn-cms.f-static.net/uploads/4449771/normal_5faadb7b76fb9.pdf
    • https://lajojadarexod.weebly.com/uploads/1/3/4/5/134506383/7720994.pdf
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5fa081659dbf5.pdf
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f87fee93364d.pdf
    • https://tibijipobarak.weebly.com/uploads/1/3/4/4/134493900/ziluvum.pdf
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f91e56c34d27.pdf
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f8c53e8e29da.pdf
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5f9cc8f0177f0.pdf
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5f9acb397677c.pdf
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f8fbe64ced3e.pdf
    • https://cdn-cms.f-static.net/uploads/4473903/normal_5fa8c5573b382.pdf
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f9528912b2de.pdf
    • https://cdn-cms.f-static.net/uploads/4409425/normal_5fa08e4284ab4.pdf
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f9730e22dfcf.pdf
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5fa1fd2051dcb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000b218.bin
fd32d145c103bc74942c858d57450f3be89056e3735874b194ef6fba47770666
pdf-font-stream PDF embedded font (sfnt) at offset 0xB218 5500 bytes
font_01_sfnt_off0000c4ea.bin
d232dc40cfc5f7e86e57632a68e01b36fda37ad72c82d46f8de474aea31c875a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EA 9492 bytes