Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fbb0146400230b…

MALICIOUS

PDF

53.6 KB Created: 2021-06-03 09:11:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 52d2a34a40bd35d022d1220063ed51bf SHA-1: 48905ef433c5a30513191d1d55a8ea359a350d9d SHA-256: a9fbb0146400230b1ab78bc2cc9f551d1b914a76323510e46b6c4a9743f74348
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The document body, though partially corrupted, contains references to these lures and the malicious URL. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead the user to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9577

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.online/app/431946152/roblox-cheat-for-two-player-millitary-tycoon-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D8 26756 bytes
SHA-256: 2e21261a10fe0bd7f826263aff1d27fa45d61d093d53fb54040b300c6ce09848
font_01_sfnt_off00008eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB2 4660 bytes
SHA-256: 465209964a09586ac5022a8b8e85d53299c19051a953d4aa9891341d9cc85b22
font_02_sfnt_off00009ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000abd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABD2 19260 bytes
SHA-256: 9acabe37b13bc894ccd746f7ff4057f233ff20e649a0cc2d541b229d3b449aad

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