Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f1c71e881b4771…

MALICIOUS

PDF

35.3 KB Authoring application: pstoedit
MD5: f813fb0bb454a82308c6d0b19c575e78 SHA-1: 207011e8e97334bd6c1409a73bcf201e74e5584a SHA-256: 71f1c71e881b4771a88df37bd0228324af351cf297c94bfa2dba42d2f69fe14f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://acostaink.com/uploads/1/3/0/6/130639790/rusoguluwari.pdf
    • http://icgpainting.com/uploads/1/3/0/4/130476013/7499092.pdf
    • http://galleryindustries.com/uploads/1/3/0/6/130604789/1bc528e4b08d07.pdf
    • http://mtdorabuzz.com/uploads/1/3/0/5/130539231/dcbe8278f.pdf
    • http://pathllc.org/uploads/1/3/0/7/130740524/ruwibifuriw-risubonorifopa.pdf
    • http://24millstillrd.com/uploads/1/3/0/6/130605216/9312b09f.pdf
    • http://italiandental.show/uploads/1/3/0/8/130874119/7146541b.pdf
    • http://patgrasso.com/uploads/1/3/0/2/130271043/0fe0dc787a25a2.pdf
    • http://livelikelincoln.com/uploads/1/3/0/4/130490833/rezizekokatugeb.pdf
    • http://bowensupcycledbagsplus.com/uploads/1/3/0/7/130775560/sosiguxoga_bagubukolelif_vixufurale.pdf
    • http://my-chat-random-thoughts.club/uploads/1/3/0/5/130589122/moberajodevomaliso.pdf
    • http://salsmantour.org/uploads/1/3/0/5/130589083/4418628.pdf
    • http://www.mycasasale.com/uploads/1/3/0/7/130775698/130775698.html#albinism+stigma+in+africa

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032df.bin
7ad64c0886128b7bf4fb91fffe83c1204e7e4a98f3993225c388d6b08a10cdbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32DF 7656 bytes

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