Malicious PDF — malware analysis report

Static analysis result for SHA-256 395485ce7167f74e…

MALICIOUS

PDF

45.8 KB Created: 2021-06-13 17:05:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6b184099c3d5f73b4e2f3c1748cccbda SHA-1: 88103375acc34ce34d70750d65e640e74a701bec SHA-256: 395485ce7167f74eb8e26a1ac14f695ff0f63007ff68692c32d51805705c62a0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains numerous embedded URLs and a 'link farm' heuristic, indicating a strong attempt to redirect users to external sites. The document body and heuristics suggest a lure related to game hacks and free items, specifically for Roblox and Coin Master. The presence of a 'Recovery secret / private key request' heuristic, though not explicitly detailed in the body, combined with the link farm, suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 http://netcdn.co/app/431946152/roblox-how-to-get-free-things-game-hack
    • http://linens.kiev.ua/images/robux-hacks-tay-take-off_GM431946152.pdf
    • http://linens.kiev.ua/images/coin-master-free-spins-daily-2021_GM406889139.pdf
    • http://linens.kiev.ua/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdf
    • http://linens.kiev.ua/images/free-daily-spins-coin-master_GM406889139.pdf
    • http://linens.kiev.ua/images/roblox-hair-for-free_GM431946152.pdf
    • http://linens.kiev.ua/images/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://linens.kiev.ua/images/free-robux-scams_GM431946152.pdf
    • http://linens.kiev.ua/images/get-free-robux-2021_GM431946152.pdf
    • http://linens.kiev.ua/images/roblox-how-to-get-free-shirts-and-pants-2021_GM431946152.pdf
    • http://linens.kiev.ua/images/hacks-for-adopt-me-roblox-2021_GM431946152.pdf
    • http://linens.kiev.ua/images/ships-free-roblox_GM431946152.pdf
    • http://linens.kiev.ua/images/cupcake-hack-roblox_GM431946152.pdf
    • http://linens.kiev.ua/images/coin-master-free-soins_GM406889139.pdf
    • http://linens.kiev.ua/images/pin-roblox-card-free_GM431946152.pdf
    • http://linens.kiev.ua/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://linens.kiev.ua/images/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • http://linens.kiev.ua/images/como-conseguir-monedas-en-roblox-hack_GM431946152.pdf
    • http://linens.kiev.ua/images/roblox-unlimited-robux-hack-apk_GM431946152.pdf
    • http://linens.kiev.ua/images/is-minecraft-education-edition-free_GM479516143.pdf
    • http://linens.kiev.ua/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000546b.bin
e95905b417af29cd4d937cd6ff613b97fcb0eb17c52a4d5e5d96bd3e7170d687
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x546B 25516 bytes
font_01_sfnt_off00008f2d.bin
a167bf44706e3d8d62cbbcacc66938238089672ace6fb6f6fd03089c13fa731f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2D 18792 bytes