Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07f757a7bff9854…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 10:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d79d69e916e3d6163bf211f995c7d7f5 SHA-1: 239876c2e1413ec6d4136f549a945ecd8208b5c2 SHA-256: f07f757a7bff9854dad028f1ff6f717da975898e3805823c6d102492a76e3390
280 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on "game hacks" and "free generators." The document body and heuristics indicate a fake CAPTCHA or human verification prompt, suggesting an attempt to trick users into executing further actions. The embedded URLs point to known malicious redirector infrastructure and a large number of SEO-optimized PDF links, indicating a coordinated effort to drive traffic to potentially malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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) or Microsoft license-boilerplate 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
  • 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/free-spins-on-coin-master-links-2021-game-hack In PDF document text
    • http://agroturismoarkaia.com/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://agroturismoarkaia.com/images/games-to-get-free-robux_GM431946152.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_003_off00004b33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B33 24524 bytes
SHA-256: c1cd62472e994b99f35035053f6e9fb7eb7a7de72913edc2bae39343bbde16de
font_01_sfnt_off00008361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8361 18456 bytes
SHA-256: 7b1155f871a560b207ad2828617dae8a6faf2a903bcd289e8190a508e5d9fe16