Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b1951b1fe31af9…

MALICIOUS

PDF

67.2 KB Authoring application: Pdftk
MD5: bf1e8b1e761c061566df92d389c342f3 SHA-1: 8d51e0bc3b515ccc251f116b8b9a56166d3414cf SHA-256: 30b1951b1fe31af98e003fb037d3c12fdb7331cc907a1e9d546c7c09d61a844e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though truncated, mentions 'Sherlock holmes pdf books download', suggesting a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://firedupaboutfitness.com/uploads/1/3/0/3/130379351/wuladubazur.pdf
    • http://danahalllcpc.com/uploads/1/3/0/5/130550953/3679374.pdf
    • http://rhythmjackson.com/uploads/1/3/0/6/130621576/rogolalada.pdf
    • http://americanshomer.com/uploads/1/3/0/6/130620923/4013f0e94f23.pdf
    • http://temebe.supervasya.ru/uploads/2020/01/28/xugefolujigo.pdf
    • http://doorrushfour20.com/uploads/1/3/0/7/130738616/bedagades-kovedikafidu-lunonusokuwe-surekosijulu.pdf
    • http://aclifesciences.biz/uploads/1/3/0/4/130488979/raloxilavexirur.pdf
    • http://perfect-right.com/uploads/1/3/0/5/130589209/jibisurosat-porakazifoke.pdf
    • http://iweargreatness.com/uploads/1/3/0/5/130541745/130541745.html#sherlock+holmes+pdf+books+download

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011f6.bin
02f0cddef9be0ff6d293a5393e6af53280cfa134099295a3fc987ae00363c5eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6 8452 bytes
font_01_sfnt_off0000674a.bin
669a22844ddb84b64a1d93eb6147c2b8b7ca76f4316fe4be2bbf69c96252e72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 16180 bytes
font_02_sfnt_off00007f30.bin
554515d85fb503b44ea20358b0af24afc7e696066b7c767752b3c66a3f741538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 45272 bytes

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