Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a11a670507f6c5…

MALICIOUS

PDF

46.0 KB Created: 2021-05-16 23:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 91a6720d25021c94508aea458d366c91 SHA-1: e41e18e30cae191e4b9a89bd74ff3da8ba81a285 SHA-256: d7a11a670507f6c5de57e44ac092a5b05223766232142f1e765c2d4cd4ea58fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising game hacks and cheats, which is a common lure for malicious content. The heuristic PDF_GAME_HACK_REDIRECT_LURE directly identifies this behavior. The embedded URLs suggest a phishing or scam attempt to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/hack-coin-master-2021-pc-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-coin-master-spins-link-facebook_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FB 27624 bytes
SHA-256: 96841427561e943c834fa8268718d3b74c76c39be978f00a1e71b4831a3312aa
font_01_sfnt_off0000873e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873E 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00009168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9168 18272 bytes
SHA-256: 8f307cdc696a3c0f8826b97bc83261752f53ae34b16e8994a9d0994350048eb4

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