Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9980351623e193…

MALICIOUS

PDF

250.8 KB Created: 2021-07-05 05:19:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9a597d4b1c20f64d85edbe5bea6bd4d5 SHA-1: 49530d31d9925ca708558ac507ad6600a540aa44 SHA-256: 2f9980351623e1931cbf8569a0a4a547e66061c58daee5685e864223ba8753d5
258 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1555.003 Credentials from Web Browsers

This PDF document employs a multi-faceted lure, presenting a fake CAPTCHA and urgency prompts to trick the user into clicking a link. The link, disguised as a download or verification, impersonates the 'Apple' brand and directs to a known malicious redirector infrastructure at http://netcdn.tw/app/1330123889/pubg-30-uc-buy-game-hack. This pattern is consistent with credential harvesting or MFA abuse, aiming to steal user session tokens or credentials.

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-30-uc-buy-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-30-uc-buy-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-robloxcom-exploit_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-accounts-2021-with-robux-bugmenot_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-one-punch-man-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-bc-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/el-pacmero-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-shirt-designs_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/t-shirt-roblox-girl-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/prison-life-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-gift-card-codes-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-free-now_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-free-2021-septender_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-skin-pro-free_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_024_off00037da2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37DA2 25928 bytes
SHA-256: 4b39f89bcb32fe6d2f3ebf7960e2466c06acbb634299a52641c702ed8ef10766
font_01_sfnt_off0003bab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BAB6 18652 bytes
SHA-256: 13f48f4195d2ffbb7294c1648a85d72d6883a76a5ddffae129c2dcd14edf05a9

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