Malicious PDF — malware analysis report

Static analysis result for SHA-256 a968c4e0eb4bc46d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 20:27:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f1b6c51d732fe39ff8ab9dba519d520e SHA-1: c00a2bdf7762bfc82d73f3d19eba2d4a30c43d91 SHA-256: a968c4e0eb4bc46d39cbe978654f8a99569eb5dea6abfac07dfc9a668c6555d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors and other PDF files, masquerading as game hacks and free currency generators. The heuristic firings indicate that the document is designed to lure users into clicking these links, which likely leads to further malicious content or malware downloads. No scripts were extracted, but the embedded URLs and redirector lures are strong indicators of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-rare-cards-for-coin-master-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/extension-bigefpfhnfcobdlfbedofhhaibnlghod-mega-securehtml-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-pillow-simulator-free-pillows_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-mobile-cheat_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-a-free-knive-in-roblox-cbro_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/best-games-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/today-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-rc7-apocalypse-rising-hack-scripts_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/grabpoints-robux_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_002_off0000319e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x319E 22908 bytes
SHA-256: 2e43909a08a7c19b7f5d38b2d9da0c062a08c70a70f48fc3d78be59faba1885e
font_01_sfnt_off000064f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 18172 bytes
SHA-256: f26c4cc90aa30d03f9af784062541b005981ee6f19e4aad4ceca08ceeafd240a

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