Malicious PDF — malware analysis report

Static analysis result for SHA-256 f836368e08bdb401…

MALICIOUS

PDF

47.0 KB Created: 2021-05-15 13:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 167a01fb7f2831e995ab977bc80a0fd5 SHA-1: 0ed057a4b26a3038c9013f59bf672ade25bfc64a SHA-256: f836368e08bdb401e4cfadd3b3bb7f1b76b86293d4a78825b1dddc644f0e110c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors and scam sites, specifically targeting users interested in game hacks and free in-game currency like Robux. The presence of a 'free generator / game hack' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. While no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/20210-robux-game-hack In PDF document text
    • http://apteka-ot-sklada.com.ua/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/wurst-commands_GM479516143.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://apteka-ot-sklada.com.ua/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C0 28804 bytes
SHA-256: fede2b5225ceeca45918306858d555a8264fa1696ad8fb172f1b94c7f90c8b7b
font_01_sfnt_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000950f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950F 18252 bytes
SHA-256: c6c6b837e22de3676a2ba596b9db5dc5a1db3890ceafc7e2998a39c6caf756de

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