Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcb1a68e6cf01cf…

MALICIOUS

PDF

40.3 KB Authoring application: pstoedit
MD5: af6793385e69658a5231078c48e3b5f8 SHA-1: 0a76578b6e87ff063d80773408b19d8037d3b448 SHA-256: abcb1a68e6cf01cf9f91c26e09ba703f00b615690dc82f4dacd4fda49025b25d
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0. The document contains a large number of embedded URLs pointing to other PDF files, suggesting a link farm or a distribution mechanism for further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://suvabuw.galaxytools.ru/uploads/2020/01/28/xenagibexezosigeg.pdf
    • http://mohannadgharaibeh.com/uploads/1/3/0/6/130620635/wowalagakex.pdf
    • http://beboldbebrilliant.com/uploads/1/3/0/2/130272328/cabf16.pdf
    • http://taxkill.com/uploads/1/3/0/4/130476248/8719759.pdf
    • http://mycannablissonline.com/uploads/1/3/0/3/130313428/mefamitul-mewexewotodibev-riwesadikaxina.pdf
    • http://unityphp.com/uploads/1/3/0/4/130488169/2019298.pdf
    • http://altasanacion.net/uploads/1/3/0/2/130273799/jigiwekafedukozupola.pdf
    • http://brandingfaithdesigns.com/uploads/1/3/0/7/130776225/tobagatavefavizotas.pdf
    • http://nhtmedia.net/uploads/1/3/0/4/130483821/831533.pdf
    • http://beyondpotential.ca/uploads/1/3/0/6/130604067/e6f21a1bf3765.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/3/130323542/130323542.html#jual+bmw+e36+323i+manual

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013d2.bin
a57657d3e731f0019980b00eadfa303e24ae4d51828e431b530cf97578a79020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2 8200 bytes

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