Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e07112842c12cd…

MALICIOUS

PDF

34.4 KB Authoring application: PDFedit
MD5: be2ed22bc312251ecd89f95361c0e3e7 SHA-1: b2e0993c2c91f143b4a301d2d3386387b69a3956 SHA-256: 40e07112842c12cd1571ebb7cbd7c7ef9feaa5e233a7742905ca05ad65722891
150 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple external PDF files, a common technique for SEO poisoning and distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Punctuation worksheets fifth grade' and includes numerous URLs, suggesting a lure to download further malicious payloads disguised as educational material.

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://mgodfreycreative.com/uploads/1/3/0/3/130379135/nevifobojozozivu.pdf
    • http://unutma.com/uploads/1/3/0/3/130379341/tavapipotirada.pdf
    • http://alsupmusic.com/uploads/1/3/0/7/130740412/c97438.pdf
    • http://mysecretlagoon.com/uploads/1/3/0/5/130590205/3b807ad.pdf
    • http://holidayhoarders.com/uploads/1/3/0/5/130588732/dimiwumimuwidej-towajisibukat-kakegexego.pdf
    • http://dominadomino.co.uk/uploads/1/3/0/4/130479472/a3e30.pdf
    • http://anarchydieseltuning.net/uploads/1/3/0/7/130776749/1299b659856.pdf
    • http://themedicalscienceeditor.org/uploads/1/3/0/6/130622033/130622033.html#punctuation+worksheets+fifth+grade

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001105.bin
d4add91e96446557648b8a1dd0b9846ae987e9de2a49c741c888d4b394c73952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1105 7952 bytes

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