Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84a8146351c0d6b…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 18:35:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ff951d6cd52f9691a88418351104d485 SHA-1: 3b804e7e3730d9d8be7882041a55ffe6ab4e1ffc SHA-256: a84a8146351c0d6b202558de5c91416c0e7e633fa872f695677bfd99a050d6e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "Coin Master Hack" which redirects to a malicious URL. The ML classifier also flagged this PDF as malicious. The embedded link is designed to trick users into visiting a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/coin-master-hack-2021-download-game-hack In PDF document text
    • http://santjoandelesabadesses.cat/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/roblox-points_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://santjoandelesabadesses.cat/images/free-robux-for-kids-no-verification_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_003_off000049f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F6 25464 bytes
SHA-256: b4cd5a7fcc6585a775476db31b7e0778347998591441fcff81a229281bcda547
font_01_sfnt_off000082f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F1 18696 bytes
SHA-256: 01e33fa384fcd9559826a4aa1de189e20085b3e2fa6b70097625b29721cffd1e

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