Malicious PDF — malware analysis report

Static analysis result for SHA-256 06820009e8750610…

MALICIOUS

PDF

69.9 KB Created: 2020-12-19 14:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37e7f1429ec0b05dd1bb494d174e79ae SHA-1: 1d78bca9fcbdf8b844c1fa02a41fb1831f0f00da SHA-256: 06820009e8750610662db6828a703e72ce82b896086cc0519880e7cc1da57cc7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary malicious URL being trafffe.ru. ClamAV and ML classifiers strongly indicate this PDF is malicious, likely a phishing or trojan distribution vehicle. The presence of embedded links and the overall structure suggest an attempt to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=quotes+about+darkness+into+light
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fddacccbad3f.pdf
    • https://tebixuku.weebly.com/uploads/1/3/4/5/134595315/79a8fff96173.pdf
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5f93ec490ec9a.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f9226c6c5023.pdf
    • https://wisefumi.weebly.com/uploads/1/3/4/6/134672277/repom.pdf
    • https://cdn-cms.f-static.net/uploads/4490371/normal_5fad627c553f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/potofaw/54563359013.pdf
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fc4411e145a8629dc37be28/1606697247089/miwutulaguvilikuxetetitim.pdf
    • https://static1.squarespace.com/static/5fdc9fba3254dd38eed5a910/t/5fdcd3d3e6fc5f5a915ebd8a/1608307667848/thriller_tamil_movies_free.pdf
    • https://s3.amazonaws.com/lezopobigeza/17982686229.pdf
    • https://s3.amazonaws.com/vikukinumet/affective_commitment_definition.pdf
    • https://s3.amazonaws.com/nokiva/vukegomutubopo.pdf
    • https://s3.amazonaws.com/godewumazek/tinkle_digest_online.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_off0000d343.bin
ae6e678a4a871680bf3c1539b64ba6d87c6770609477e51dabb9787f6e5dddd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 5352 bytes
font_01_sfnt_off0000e567.bin
9dece3455c6cf5b7d9134827d3438b23efcb91c8789eab2aeae0e938fd6c6745
pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 11000 bytes