Malicious PDF — malware analysis report

Static analysis result for SHA-256 37965145128c02f0…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 21:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 623eaac11712d885613a50d74178821d SHA-1: 21c8e540b6be3a448111790714be8c33d2662981 SHA-256: 37965145128c02f0dd5a65acab0d858b4b05504b7842d128b313096c1a1ce21d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically targeting users with lures related to free game currency and hacks for popular games like Roblox and Coin Master. The document body and embedded URLs strongly suggest a phishing or scam campaign designed to lead users to potentially harmful websites. No scripts were extracted, but the PDF's structure and embedded links are indicative of a social engineering attack.

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.tw/app/431946152/www-roblox-com-free-robux-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/wanted-money-hack-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-heroes-online-free-access_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-mafia-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-robux-site-greenlegocats_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-hack-mod_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-codes-for-400_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-jeux-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-walk-through-walls-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-exploit-scripts-free-download_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-link-2021_GM406889139.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_off00002ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF6 22496 bytes
SHA-256: 23c3aaf32b55cde4603d68918379f0d9f0b37ecdba2d70546fea13e1de153c3d
font_01_sfnt_off000060b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 19412 bytes
SHA-256: 9f2d18035413ba33397c677b2581e7e69ab306c490ad5b1efc57e4a607bb5205

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