Malicious PDF — malware analysis report

Static analysis result for SHA-256 1922a172fd7a7743…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 06:16:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 66b96c6a3782d5840125c557c823592c SHA-1: 95865dced090ad7cef8fe0ead7df06fd96c7c210 SHA-256: 1922a172fd7a77434d1f492324d28119e8d329a2dff74bf14e7e68bd4b3e8fa3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as free game hacks and generators. The document body and embedded URLs suggest a lure to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/free-minecraft-realms-to-join-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005264.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5264 25136 bytes
SHA-256: a0931a77705cda7dbfc8f6005d6c7f951a885db78d8340e2dd14f79eb3cd3532
font_01_sfnt_off00008bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 3132 bytes
SHA-256: 58e2f4fed192d5cf0b672c152ca90e3b3ba3c0f3c58ebd55443c1dadbd2464bf
font_02_sfnt_off000096c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C9 18208 bytes
SHA-256: 07ea4a0a65e268d617c6aeb2efc29ec1284b659111274d24dd89fc4161b37103

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