Malicious PDF — malware analysis report

Static analysis result for SHA-256 2746683ffa3afdb8…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 17:18:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8bc03e482153a8f481f28fc239c62289 SHA-1: 47adf73f9a486ff40141450805482dacabeb7630 SHA-256: 2746683ffa3afdb89a4f67aa6f5566d0feee1fe6dbbfc91a8e83e4f884f318d1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wurst-112-2-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/fashion-frenzy-roblox-free-game_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/barbie-free-online-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-paid-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-golden-suit-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-can-you-teach-me-how-to-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-number-censorship-cheat_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacked-by-roblox-i_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-verification-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-summoner-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-spin-link-today-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_off00002ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDD 21928 bytes
SHA-256: 32f2026a9e52144b1587d3ad633363c6099a73cdc3289d542061ee9c69ed0419
font_01_sfnt_off00005e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 18304 bytes
SHA-256: 68e2a8980d4d1d96479e0928bc49a2bdfde0755f91194607075bba0998720a46

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