Malicious PDF — malware analysis report

Static analysis result for SHA-256 35193fa1d556821c…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 10:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a83e73f691e378be5859472a7ab09fb6 SHA-1: d1fe2acafe043818c0a08181cc807cc73ddb297a SHA-256: 35193fa1d556821c4bfbc1da24795a39ca07a6811f72e8f27563eee2d68a5160
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/free-op-minecraft-servers-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/pack-free-maps-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/easiest-ways-to-make-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-install-free-mac_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/fearless-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-jailbreak-speed-hack-check-cashed_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-in-one-second_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-do-you-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/instaler-un-cheat-pour-roblox-phamtom-forces_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-speed-hack-2021-march_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-exploit-free-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-accounts-with-robux-2021_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_off0000302f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302F 22008 bytes
SHA-256: 904d8629d2b35e690e050156393845fd18bd9b536f2b52bdc94d9c87a98465d7
font_01_sfnt_off000060cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CB 18148 bytes
SHA-256: 09b378257ae92cafd0d3c1f5f7a36903dc8b82a48bbd3e05dc40a1258008c31b

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