Malicious PDF — malware analysis report

Static analysis result for SHA-256 311b16aae204224f…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 17:49:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 911eae390138bcf79d5fc48bb0354563 SHA-1: 3cc0be71875ca106616b5c8f914e7fd2219313aa SHA-256: 311b16aae204224f064fec609deec632b0fabe45f050148a78a2e15a05edf65f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free generators, directing users to malicious redirector infrastructure. The embedded URLs, such as https://netcdn.online/app/431946152/free-account-roblox-2021-game-hack, are indicative of a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/free-account-roblox-2021-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-how-to-get-car-crushers-2-for-free_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-hotel-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-hack-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-april-fools-hack_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_004_off00005227.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5227 27684 bytes
SHA-256: 07e0bce4e1bceb54cd117cbb9b6282ed118898e453b4d12e0b7c1f6a0375f331
font_01_sfnt_off000090d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D4 18596 bytes
SHA-256: 49dd130833fa0cd6018d5b82740263a755cad87b9d689d18589cb9fa20820e79

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