Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98e84ff4ceae92a…

MALICIOUS

PDF

74.3 KB Authoring application: Poppler-utils
MD5: 35489e62f2c4b108396706d468002328 SHA-1: 730890af7dbae9e059233b2a1bf484608b1af842 SHA-256: c98e84ff4ceae92a798da545ee778824a5b118bb8e05e0fd417650226a08155a
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, for malicious content. The PDF_SEO_LINK_FARM heuristic identified a large number of embedded external links, with the first being http://receiptreceipt.com/uploads/1/3/0/6/130639965/lobara_fekejevive_litofuxita.pdf. This suggests the document's primary purpose is to act as a lure, redirecting users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://receiptreceipt.com/uploads/1/3/0/6/130639965/lobara_fekejevive_litofuxita.pdf
    • http://8change.org/uploads/1/3/0/3/130323515/431914.pdf
    • http://twinflameoracleshamanhealing.com/uploads/1/3/0/6/130639254/xibixumu-wulimogezisid-fitesan.pdf
    • http://modelmefamous.com/uploads/1/3/0/4/130435985/sijojotatefa.pdf
    • http://signalhill.com.au/uploads/1/3/0/3/130323409/d322120ce8d8.pdf
    • http://moyo-up.de/uploads/1/3/0/6/130604791/4145703.pdf
    • http://cityonloc.com/uploads/1/3/0/8/130814225/130814225.html#afc+asian+cup+2019+last+16

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d5.bin
51155bbde901e46afbdc4132667d5ef30b40ec0e6357934e343ea965e7cb93d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5 11960 bytes
font_01_sfnt_off0000d0b8.bin
5db45dd0a24d716aac5e0647b8df6f9c6334294732deaa7b836cd722c77ad1a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 17976 bytes
font_02_sfnt_off0000e943.bin
62acefad46f05fbaab76cd562d89bb3e901e651ac3be2ff3ec0491a2794e2d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 2768 bytes

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