Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c928fcdc9827e3…

MALICIOUS

PDF

39.3 KB Created: 2021-05-21 11:00:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3fa698f5a877b9906eb81f85eea47f21 SHA-1: 0601de5569fd7b29d460e93ba5643ee1094a843a SHA-256: f4c928fcdc9827e385831c87cccce82c6f09f5c84f7b3591b37ebea9f3e53061
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links disguised as "free generator" or "game hack" lures, impersonating the UPS brand. One of the primary links, https://netcdn.xyz/app/431946152/how-do-you-get-roblox-for-free-game-hack, is associated with a credential phishing attempt. The document's structure and embedded links suggest it is designed to trick users into visiting malicious sites, potentially leading to credential theft or the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-do-you-get-roblox-for-free-game-hack.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://netcdn.xyz/app/431946152/how-do-you-get-roblox-for-free-game-hack PDF link annotation
    • http://nicoletastancu.ro/images/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34DC 24840 bytes
SHA-256: e9e9cbfa2087af0f3d16b03c3dcf42e800d9b2db603d988f237e7167f161f3ef
font_01_sfnt_off00006d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000076de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 18688 bytes
SHA-256: c319980467b8bcea808cf7446b1cb0422dd1c28f9b99e7a79dce679e259df094

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