Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f0c366b8bb1d2c…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 17:40:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f3d5f748db4062016ec2ca3387581c93 SHA-1: e06c77459bb24b6606620060f35229120afb12e1 SHA-256: 83f0c366b8bb1d2cba6c48422ad40d1c7926f436ddec2d9333c4ae80af68f3f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free in-game items for Roblox, a common tactic for distributing malware. It contains multiple embedded URLs, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/how-to-get-free-hair-roblox-2021-game-hack. The presence of a visual download button further supports the malicious intent of directing users to potentially harmful content. No scripts were extracted, but the overall structure and linked URLs indicate a phishing or malware distribution attempt.

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.co/app/431946152/how-to-get-free-hair-roblox-2021-game-hack In PDF document text
    • http://library.imz.or.id/repository/best-free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-decals-for-roblox-work-at-a-pizza-place_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/synapse-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-phantomforces-flame-cheat_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-high-school-how-to-fly-for-free_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/pokemon-go-free-yamask_GM1094591345.pdfIn PDF document text
    • http://library.imz.or.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-synapse-x-free-key_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
font_00_sfnt_off000030bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BD 22392 bytes
SHA-256: 1b1d8b984c6c0c0d36bfd2748662c1897c39a842fd779b1fd647749cb37a24f0
font_01_sfnt_off00006283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 19440 bytes
SHA-256: a66d9dbe74b171a6cb38a8747184842da61bed83591b67c73670e1db475d473d

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