Malicious PDF — malware analysis report

Static analysis result for SHA-256 006ff38fa5968ae5…

MALICIOUS

PDF

251.1 KB Created: 2021-07-04 04:23:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 215816b6518d2c3b499a99fc37b4f8ec SHA-1: aa547146b6e7ebb07dd31c7099aef2871212766b SHA-256: 006ff38fa5968ae5232aed8a21f3d6235df40e0ac5c78a13244764760b489182
258 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1534 Credentials from Password Stores

The PDF document contains multiple heuristics indicating a phishing and redirection attack. It presents a fake CAPTCHA and urgency lure to trick the user into clicking a link that impersonates a brand (Apple) but leads to a malicious redirector disguised as a game hack generator. This pattern is consistent with credential harvesting or malware delivery campaigns.

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-yollama-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-yollama-game-hack In PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/roblox-creeper-chaos-hack_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/cool-hacker-names-for-roblox_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/robux-free-no-human-verification-pc_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/slurp-hack-makes-roblox-freeze_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/how-to-hack-roblox-assassin-on-ipad_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-roblox-groups-with-funds-2021_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/roblox-hack-tool-download-2021-pc_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/jack-hack-robuxcom_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/how-to-get-free-bc-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/roblox-minion-game-hacked_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_off00037ec3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37EC3 25928 bytes
SHA-256: c2fb9f4d49ab09782c45af690ebc2e4a82155beb2c9d9eb271f24129a9afac7b
font_01_sfnt_off0003bbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BBE4 18764 bytes
SHA-256: 76ddac85d461cc4478695a9e48442fab8aa6bbdedb98964175cb61fef91bdbad

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