Malicious PDF — malware analysis report

Static analysis result for SHA-256 781d25c0fd5f74ec…

MALICIOUS

PDF

48.5 KB Created: 2021-06-11 12:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e75ffa2ccc8d10a610018bb0e97de97 SHA-1: 11e3ed63b5ad4d6aaf99e907c8822ee98cf3a2be SHA-256: 781d25c0fd5f74ecc0abc1e9c39edf659745df4dfd872bd3b21f2fef582376b0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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.
  • 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.tw/app/431946152/copy-and-paste-for-free-robux-game-hack PDF link annotation
    • http://zarinnameh.ir/images/coin-master-map_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-roblox-today_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-cheat-mad-city-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://zarinnameh.ir/images/pase-bin-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-1-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-ban-someone-with-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-trucker-hat-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-without-promo-codes_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_004_off00004fbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBB 26288 bytes
SHA-256: c622aca1382b65f2e6b40e6a1227627fe0128280fe3b4a52b8c2274fe7b72ca3
font_01_sfnt_off00008bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDB 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9882 19028 bytes
SHA-256: b3d7fc2a5714a91b38596bda219154ec2b7436787bb57a1c31c9968951d9083e

Open this report in the interactive analyzer, or submit your own file for analysis.