Malicious PDF — malware analysis report

Static analysis result for SHA-256 893ffb03626e9ac2…

MALICIOUS

PDF

58.4 KB Created: 2020-11-24 18:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d24000db9399c6dab9459f7cba1d81a SHA-1: 0e01b7d96326ba8a5bc6d656335f4e54b05d7c4b SHA-256: 893ffb03626e9ac26d3412191de7e0b8b3c0ce663aefa2dcecaf96e96cda7e56
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate that the primary purpose is to redirect users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 4

  • 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
  • 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://trafficel.ru/aws?utm_term=anualidades+ordinarias+o+vencidas+pdf
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f8a2a6f897c0.pdf
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f9ba4b5058bc.pdf
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/88947.pdf
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f8c6d19254db.pdf
    • https://cdn-cms.f-static.net/uploads/4420761/normal_5f96ca95c221c.pdf
    • https://jugubiwujivivej.weebly.com/uploads/1/3/4/3/134352954/db4c5f86.pdf
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/pogizigafi-lelapez.pdf
    • https://sapakokejepudig.weebly.com/uploads/1/3/4/4/134457578/lomafalip_diwojipat_bivubu_xuneligig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/titugome/sujiz.pdf
    • https://s3.amazonaws.com/tesapibebujep/71342725420.pdf
    • https://s3.amazonaws.com/jozetej/78048085020.pdf
    • https://s3.amazonaws.com/lorifawuvawot/kowisibimuwex.pdf
    • https://s3.amazonaws.com/virumutipalis/mario_64_apk_android.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd1e.bin
291796fa67c3a82d917835e1be27daf7f058c2e95b10340c3e19fec8317ff838		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1E 5196 bytes

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