Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e31a81107743c2…

MALICIOUS

PDF

54.5 KB Created: 2021-06-03 14:50:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 46d03fb68e2378755d8035f8e38a2783 SHA-1: 3efbe9d269347ae8fd447400441236b5d2586b9d SHA-256: c3e31a81107743c2be0e19bda5b620ce9b0003e66178c7274fec3b4f0f1f158c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking malicious links. The embedded URLs redirect to further malicious PDF files hosted on suspicious domains, indicating a chain of malicious content delivery. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9499

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/how-to-get-minecraft-java-edition-for-free-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/can-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-activegamer_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_off00005150.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5150 25068 bytes
SHA-256: b2677a25ec757a3c70ec66c79005aa26c098e043808264ad57e3838442d92a96
font_01_sfnt_off00008a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9E 7936 bytes
SHA-256: 038829bc81e15b6024d2a75b24b2b95e916dd2d8797e4f87b867de59d61698ef
font_02_sfnt_off0000a3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C8 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB254 18328 bytes
SHA-256: a790f51109e75a7469d42ca78e2bb2ee6ca1fa0985c1c579ea7802a52011e373

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