Malicious PDF — malware analysis report

Static analysis result for SHA-256 133ca2a5ebf1480a…

MALICIOUS

PDF

34.3 KB Authoring application: pdf-parser
MD5: e826209a4ce71c4539f12773c1695b2a SHA-1: 2d34036ba7675aa4fb952b3eb54838c0e636e1a7 SHA-256: 133ca2a5ebf1480ae3b2fbc005fac283ce3ee804396e53c8e4a618318215d165
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files, a technique often used for SEO spam or to host malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs are the primary indicators of compromise.

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://yacsur.net/uploads/1/3/0/5/130551675/jexijovaripagobupim.pdf
    • http://passyunksquare.net/uploads/1/3/0/4/130435717/b82164c94.pdf
    • http://mrncleaningservicescom.com/uploads/1/3/0/2/130289172/jozarunoxubomezudipa.pdf
    • http://taiwanmusicexport.com/uploads/1/3/0/6/130620877/5345444.pdf
    • http://millymop.co.uk/uploads/1/3/0/8/130874277/dipiruv-zezugozed.pdf
    • http://oxigenar.org/uploads/1/3/0/6/130639542/0b9721ca92cd6c.pdf
    • http://l-etro.com/uploads/1/3/0/4/130476243/ee7d73650f.pdf
    • http://springshine.us/uploads/1/3/0/3/130313107/setitusubotezegenola.pdf
    • http://miamiexportpartscr.com/uploads/1/3/0/7/130739779/a557b03fe979.pdf
    • http://nicolanotes.com/uploads/1/3/0/2/130270863/tebadovosukidisu.pdf
    • http://infinitumnihilmedia.net/uploads/1/3/0/7/130739828/ee301e.pdf
    • http://nuzzdos.com/uploads/1/3/0/2/130291350/kazobuxikanul.pdf
    • http://drywallnewmarket.com/uploads/1/3/0/2/130288301/130288301.html#3+phase+rectifier+simulink

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb8.bin
484eb69b4a7e214184511b7acf5accdb323eef917ed7d43f762c2fba0d2cb132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB8 7712 bytes

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