Malicious PDF — malware analysis report

Static analysis result for SHA-256 1371f49ad4dc5247…

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 20:18:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e06cbf34c8450e6928cc5987afca023a SHA-1: e7bfb7919f3c8fbf3f23536fcd71e0fffc9eefd0 SHA-256: 1371f49ad4dc524753acd5ae93ed981a9daf2b0cc8f7a3736fb810f185a01a23
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 0.9980

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/406889139/2021-free-spins-coin-master-game-hack PDF link annotation
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-speed-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-use-brutus-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-invitations-free_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-get-free-cloth-roblox_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-get-bc-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/best-roblox-hacks-2021-hand_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-google-hoodie-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-bf-cheating_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-hack-teleport-and-wool-and-speed-and-money_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/cheat-block-piece-roblox_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/hack-para-tener-robux-como-tener-robux-hack-2021_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_off0000337f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337F 23248 bytes
SHA-256: 59b6adfbe7ee99e0656f7cdc713641fccbf01718066d19f71f35796e2b0f65be
font_01_sfnt_off000067fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 18576 bytes
SHA-256: e072abe3ddea7348b6ad42f3e58cf0336d8cc97c01862fb082958ccb0059bec3

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