Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f6bc661f398f84…

MALICIOUS

PDF

41.3 KB Created: 2021-05-11 14:19:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 410f3f6a8385337d5cb8863faec72ffa SHA-1: 6681fc30f3fe78982daf356ec14bd7d9b8bfe119 SHA-256: f2f6bc661f398f840a59cb230dd5090ecd444619f71371367322fc32c24b5a4f
240 Risk Score

Malware Insights

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

This PDF document is designed to trick users into clicking malicious links by impersonating Microsoft and presenting a fake CAPTCHA. The primary lure is a 'free generator / game hack' that redirects to malicious infrastructure. The document contains multiple links to known malicious redirectors and impersonates brands to increase click-through rates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-piano-hack-game-hack.
  • 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/roblox-piano-hack-game-hack In PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-download_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.micIn 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_off000047a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A3 24384 bytes
SHA-256: b7bb61e87155efb17a26abb22ad2f32e18213cc9206ae8006225f55a5cee6843
font_01_sfnt_off00007e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E54 18456 bytes
SHA-256: b3a5bdafa913fbeb08409da0979c792cb3491f79dd739ad0ffcb7a8a40d00987

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