Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49c73dd30b8d996…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 20:21:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c6d9f27e4ea855f660700c7a79c4cda2 SHA-1: dc108d212a17f3cc484e865cfc21bcfe758d9712 SHA-256: a49c73dd30b8d996db0a4ca5e0869776fc3cf325d3b3c5c762706cd0a06321d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free in-game currency, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a phishing or scamming attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-fb-champion-game-hack PDF link annotation
    • https://htdvn.com/public/upload/files/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-do-u-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-username_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-and-tix-giver-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/tiktok-free-view-year_GM835599320.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-parking-in-back-id-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/non-sans-diamond-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-il-robux-es-verdad_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/download-synapse-roblox-hack-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/robux-match_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F30 23036 bytes
SHA-256: 2f9e5ca13345d3edc510d3463ae6b12387b2fd96ddb5566747f6afa7fd104528
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 18756 bytes
SHA-256: 0e57365e0ea4931a78c415fbfebce8cc289a043db7203917d9e2ad81b8539a15

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