Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c0ca33c22de922…

MALICIOUS

PDF

37.9 KB Authoring application: GIMP
MD5: acb64fa6a8bafcba77124eaba3b33a63 SHA-1: 818de1c98b75ce36189be23bc73321f2abe0e387 SHA-256: 89c0ca33c22de92269c0fd2daa488c3f00fa1fee99e167d58ef169305316bbec
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 external PDF files, a technique often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, while containing garbled text, also includes references to 'Army apft walk' and lists numerous URLs, reinforcing the link farm heuristic.

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://perfectionsyards.com/uploads/1/3/0/6/130605302/tenejebew.pdf
    • http://toscanoconstruction.com/uploads/1/3/0/6/130604011/1679022.pdf
    • http://mindforyouth.com/uploads/1/3/0/6/130620309/6048889.pdf
    • http://mri-auto.com/uploads/1/3/0/6/130639995/wugopok.pdf
    • http://matthewsprange.co.uk/uploads/1/3/0/4/130435962/4134584.pdf
    • http://barrelvisions.com/uploads/1/3/0/6/130604175/lafowuganidi-sogobebefaro-jemej.pdf
    • http://millerblade.com/uploads/1/3/0/5/130546923/9c066e3ee.pdf
    • http://propertytaxguy.biz/uploads/1/3/0/2/130287940/1774678.pdf
    • http://divipeduxa.sparepartsjumberca.com/uploads/2020/01/28/posebazokopefopopuz.pdf
    • https://kufigigajipejim.weebly.com/uploads/1/3/0/5/130546657/8526793.pdf
    • http://ndchair.com/uploads/1/3/0/6/130640027/130640027.html#army+apft+walk

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000124a.bin
ac280a74e6ae5b045ea2546fddd9c3e9fa0ecbc89c7087d9fedb1e77c6c73b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124A 8256 bytes

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