Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa72c8b7b09a466…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 01:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dd2c7972c3f64dd6c47fffc18a881005 SHA-1: 7bfa182049e44ac2d51954d0d77239d5f8d0178b SHA-256: dfa72c8b7b09a466158db355bc7a710e26a9dbb7e174d3666edf15fdd051beb0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and items to lure victims. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs and actions that facilitate redirection to malicious infrastructure, likely for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-roblox-avatar-game-hack In PDF document text
    • https://ccej.lviv.ua/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/how-to-get-things-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/outfit-for-roblox-for-freecom_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/tiktok-free-fans-video_GM835599320.pdfIn PDF document text
    • https://ccej.lviv.ua/images/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/master-coin-free-spin-daily_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
stream_004_off00005096.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5096 27288 bytes
SHA-256: 0e46e5a4d71a3d0861cf25b037321a144745fb7696c5a7d5c43eb3797fee8372
font_01_sfnt_off00008fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC7 18396 bytes
SHA-256: ea9b66db0b849f47a5cfa8545e574f06832df8c426d4970ca3b5809346365e53

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