Malicious PDF — malware analysis report

Static analysis result for SHA-256 82308c9a540f7b1b…

MALICIOUS

PDF

28.5 KB Authoring application: PDF Studio
MD5: c8fe5ee12888949696e44e07fd81ef0b SHA-1: cb88a7164846b698a722eb852ff3ad487d55323f SHA-256: 82308c9a540f7b1b0fe31c7e5e13823281db3b9ced36ca41376a225e5f2e8a28
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files. The document body mentions 'Air raid siren sound effects free' and includes several of these external URLs, suggesting a lure to download and view these linked files. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketojumi.anchevskaya.com/uploads/2020/01/28/jelozetirusaxig-pufop-fadegawezipal.pdf
    • http://1001brushstrokes.com/uploads/1/3/0/4/130478307/9508677.pdf
    • http://scrumboards.com/uploads/1/3/0/7/130738705/rerigalubasu-rewadu-vubejo.pdf
    • http://prekrasniy.fund/uploads/2020/01/29/ginowugij.pdf
    • http://blackwoodforsheriff.com/uploads/1/3/0/6/130620578/junisodakisex_kubepekirivero_nutegikavewuke.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/2/130272352/130272352.html#air+raid+siren+sound+effects+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010c7.bin
9fa12c86e28c50eec57413eb720faa46a810b7e448eac13dfdb885b30fdf1d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7 7616 bytes

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