Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f77b958e462467e…

MALICIOUS

PDF

20.7 KB Created: 2020-04-04 16:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f8370ffd87f8025c844d9828b7545062 SHA-1: 4c183c539a74505c74c5c9e35cfcd33b6b20e3bb SHA-256: 4f77b958e462467e47aef634afad74361b0a0a78e492fbfd2fc0b3f25a48c748
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document is identified as a malicious lure, likely for phishing or malware distribution. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with a clickable action, designed to trick users. The presence of numerous external PDF links, identified by 'PDF_SEO_LINK_FARM', suggests a link farm used to distribute malicious content or for SEO manipulation. The ML classifier strongly supports the malicious verdict. The document body contains obfuscated text and multiple URLs, including 'http://audreysandrasass.com/uploads/1/3/0/7/130739839/130739839.html#joel+goldsmith+books+pdf', which is likely the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 4

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 20 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://audreysandrasass.com/uploads/1/3/0/7/130739839/130739839.html#joel+goldsmith+books+pdf
    • http://peakviewinspections.com/uploads/1/3/0/3/130323173/dibutusu.pdf
    • http://aquaponicsplans.com/uploads/1/3/0/8/130813429/7633364.pdf
    • http://openyoureyes.be/uploads/1/3/0/2/130289784/subotawizuli.pdf
    • http://ironlotusyoga.com/uploads/1/3/0/5/130550891/1d8d02.pdf
    • http://smallgerman.com/uploads/1/3/0/7/130738513/gerexe_ludofejufomu_bufero_tolipuva.pdf
    • http://skfinancieel.nl/uploads/1/3/0/2/130289523/xejiwe.pdf
    • http://raisingbear.com/uploads/1/3/0/5/130589219/35247.pdf
    • http://3dflooringepoxy.com/uploads/1/3/0/6/130604311/wipaji_felosiwemomupe_jevetutanubali.pdf
    • http://behavioral-health.solutions/uploads/1/3/0/8/130813554/3077606.pdf
    • http://bassnmaniacs.com/uploads/1/3/0/6/130604950/riliw-turojemom-bijik-zurijukad.pdf
    • http://31standcicero.com/uploads/1/3/0/7/130739947/1250955.pdf
    • http://pedalling-backwards.com/uploads/1/3/0/4/130488669/jetewanawomenefu.pdf

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