Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ecb9ae42fd0f98…

MALICIOUS

PDF

32.9 KB Authoring application: Pdftk
MD5: ab3ac8e7245ac0f1976c1f302b008a6a SHA-1: e6af63ef372be662ecc81f258c182a3a24974e8a SHA-256: d2ecb9ae42fd0f98103204dd21ab099057b010c9b7a00e9a206579c3322f41fc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness. The embedded URLs are likely used to redirect users to phishing or malware distribution sites. The document body text is heavily corrupted but contains references to 'Annual report' and URLs, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://tixujijegu.c-5527.ru/uploads/2020/01/28/musobidina_tolejejejit_resujawatafanug.pdf
    • http://tort59.ru/uploads/2020/01/28/73de778bb97b.pdf
    • https://kelekemagor.weebly.com/uploads/1/3/0/5/130588870/boged.pdf
    • http://jila12.com/uploads/2020/01/29/6514010.pdf
    • http://absolutely-coraldee.com/uploads/1/3/0/4/130489051/bakemixuna.pdf
    • http://nutritionsheila.com/uploads/1/3/0/3/130323914/varimadij-mubominevuzitu.pdf
    • http://xamanismo.info/uploads/1/3/0/6/130605440/a75a82a91.pdf
    • http://cprsd2.com/uploads/1/3/0/6/130621152/81b67af0b.pdf
    • http://promiseskepthomecare.com/uploads/1/3/0/2/130271054/8063033.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/2/130288549/130288549.html#annual+report+true

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011cf.bin
33405a3a6925ddfef57ba03d718f3e68184ebaeb910278019f0bf0fc4826fc7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF 8252 bytes

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