Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f218728fa17513…

MALICIOUS

PDF

250.6 KB Created: 2021-07-05 22:06:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0f41963ad495b5faee146d00d669721b SHA-1: 2accc7185479f95b12685616ce24510b52ca3f26 SHA-256: 22f218728fa17513f3abdfbb8afd5aadb319cb46775041e44837174c88fc7d01
258 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document contains multiple lures, including a fake CAPTCHA and a brand impersonation (Apple), to trick the user into clicking a link. This link, http://netcdn.tw/app/1330123889/pubg-uc-hack-2021-game-hack, leads to a known malicious redirector associated with game hacks and potentially credential harvesting. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lead users to malicious websites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 8

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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: http://netcdn.tw/app/1330123889/pubg-uc-hack-2021-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://netcdn.tw/app/1330123889/pubg-uc-hack-2021-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-vehicle-simulaor-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-download-ios_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-new_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-a-youtuber-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-fast-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-hack-ohne-puk-und-handy-nummer-ein-zu-geben_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-promo-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/guest-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-the-roblox-sex-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-hack-lumber-tycoon-2-script-inserter_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-royale-high-diamond-hacks_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacker-finder-roblox-id_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hack-roblox-game-ability_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-coins-coin-master-link_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
stream_024_off00037d04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D04 25928 bytes
SHA-256: b594e0b553ffe5bad8567f4438b209b5d9c214fc94a4c5349dda32bde0ef60f1
font_01_sfnt_off0003ba20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BA20 18696 bytes
SHA-256: 374153c47e5e01c31b3980ea17477b5fd2b270a1bd8b0b075f3af3290d2048bd

Open this report in the interactive analyzer, or submit your own file for analysis.