Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4dfff68e6eaab9…

MALICIOUS

PDF

45.8 KB Created: 2021-05-13 17:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a0465c6b412b3bcb0c5faf96733d8ae2 SHA-1: 42c763f476d8edc06bfd90b9fbc3dea93911e8e2 SHA-256: 2f4dfff68e6eaab91c08d0c5b6e76d50ec05c3ab20e940f964c54d5c113cc739
200 Risk Score

Malware Insights

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

This PDF document employs a common lure of "free generator / game hack" content to trick users into clicking malicious links. The document displays a fake CAPTCHA or human verification prompt, which is a social engineering tactic to encourage user interaction. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded links suggest an attempt to exploit user curiosity for potential credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/coin-master-free-spins-link-today-instagram-game-hack In PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/mcpe-com_GM479516143.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://www.domkiletniskowe-wladyslawowo.pl/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off00004c07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C07 24996 bytes
SHA-256: 5cd83c30743e542344211b19008588a09cc23bed35b1a09e0700beb51a9f0095
font_01_sfnt_off000084ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5C 18960 bytes
SHA-256: c3cae131f36bdfe9c813bd150295f39ca0ceeabf3546a2df254cc03f93d9c6e3

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