Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d6ffac25a5cab1…

MALICIOUS

PDF

250.7 KB Created: 2021-07-06 05:11:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 63fb13e17a57dbdf74802d6bc04a7f45 SHA-1: faec9358e5b2830699faa9db156feac029732690 SHA-256: 94d6ffac25a5cab1526ddbf109f4ee13df0a12b81b4fd4b6b8a5757034f2b205
258 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1555.003 Credentials from Password Stores T1078.004 Cloud Accounts

This PDF document employs a multi-faceted lure, presenting a fake CAPTCHA and impersonating Apple to trick users into clicking a malicious link. The primary link, http://netcdn.tw/app/1330123889/pubg-mobile-uc-xyz-game-hack, is associated with known malicious redirector infrastructure and is designed to lead users to scam pages. The document also contains urgency lures, suggesting immediate action is required, further pressuring the user to click the link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0099

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-mobile-uc-xyz-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-mobile-uc-xyz-game-hack In PDF document text
    • http://library.umla.ac.id/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-download-for-android_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/can-pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mod_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_off00037bc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37BC6 26180 bytes
SHA-256: a2aeeff18b5a7f1f829fac508af28910ba53d20cac772f5b8a6030ad9936011b
font_01_sfnt_off0003b926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B926 19148 bytes
SHA-256: f1c2ee82d4c4762a65ad850d01f75f7866bd9a1482c1e731fa2d82cc1f1a9607

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