Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e6348ea61d7550…

MALICIOUS

PDF

47.5 KB Created: 2021-06-09 03:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c2ba598ffede1e3b16666b669fb379f1 SHA-1: c7fa151e0ec84d573c891818802bc48d4ae9b7b9 SHA-256: 17e6348ea61d7550f27cfff2e44d7fbb4cf5365e70aec44138c3abe080e96392
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, including one specifically advertising 'hack for robux and tix game hack'. The document body, though heavily obfuscated, contains similar strings and metadata indicating it's designed to lure users to malicious websites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/hack-for-robux-and-tix-game-hack In PDF document text
    • http://zarinnameh.ir/images/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-generator-simulator_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/pet-simulator-roblox-gold-chest-hack_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-money-for-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://zarinnameh.ir/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-1-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-hack-8-ball-pool_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_off00005231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5231 29256 bytes
SHA-256: ff0ddcf7d89fa3136aac777d60eeae0d90ee9b17742e51ff12366f70ea9017cb
font_01_sfnt_off00009640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9640 18704 bytes
SHA-256: c703057377d64cbbbabe6b51978f4a7556be43a1ecb0e5a1fb17a6c8ce492b04

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