Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f01a2c9748b70c5…

MALICIOUS

PDF

41.8 KB Created: 2021-05-19 02:07:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 61c46a3c2648eefc24ca84b8d69c8184 SHA-1: 0d8d7a23d134ed8c17843def53267a93a0997c4a SHA-256: 4f01a2c9748b70c59dea4ae3bb7d7b9e32a1c2ecf28c20c7a84833315a80857e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and sites offering game hacks and free currency, indicating a phishing or scam lure. The heuristic firings confirm the presence of malicious redirector links and a general ML classification of maliciousness. Although no scripts were explicitly extracted, the document body contains embedded URLs that likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/real-coin-master-hack-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A18 24528 bytes
SHA-256: f142143f55a18cc1fff25290f177e15384bb2886d48969f0b82b6f28002952c5
font_01_sfnt_off0000827a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827A 17788 bytes
SHA-256: c971b34c329d205054a16b1b5f827a74783bca0f841d374511d085dfea161b8f

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