Malicious PDF — malware analysis report

Static analysis result for SHA-256 83fc151ebddaced0…

MALICIOUS

PDF

34.1 KB Authoring application: LibreOffice Draw
MD5: d8c8a1e0bdd3f57615548f8d8e6cde52 SHA-1: 5063bd0c228ee568a011f2a952ae48583a40ee6c SHA-256: 83fc151ebddaced00fd7e2956244b0e9373833bd2a80374a51aa6f2b46b7c0be
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, while containing some seemingly benign text about electrical circuits, also contains the URLs, suggesting a lure to a link farm.

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://mypostbargain.com/uploads/1/3/0/7/130738542/nadijavekilidagiloz.pdf
    • http://dbtdelaware.com/uploads/1/3/0/2/130273735/3226425.pdf
    • http://jf1850.com/uploads/1/3/0/4/130488662/6317700.pdf
    • http://volis.centrprava40.ru/uploads/2020/01/28/jitefuvapiw.pdf
    • http://candicemoss.com/uploads/1/3/0/7/130739393/cd879dc8b.pdf
    • http://stitchingkisses.com/uploads/1/3/0/5/130588543/fagidusukubow-xozevoga-xetipamixej-zakusaro.pdf
    • http://monarchacquisition.com/uploads/1/3/0/4/130494289/ec737f4afc59c6.pdf
    • http://clearviewglassrepair.com/uploads/1/3/0/6/130604602/neleg.pdf
    • http://reboundat.com/uploads/1/3/0/4/130436399/130436399.html#electrical+circuits+symbols+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c3.bin
5f0a459f4b840d4d9db44ea9ffcfd132b23cee7ac71bd99f5618e0cec8885d7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3 8136 bytes

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