Malicious PDF — malware analysis report

Static analysis result for SHA-256 3124707edf0fce0c…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 17:06:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9d2d0c36b0dfe00666fe60cf9decc5d0 SHA-1: bb56f2c6f2007ff48c4410d00505b1c6eb01560f SHA-256: 3124707edf0fce0ce95f50cdd3ebae665354b76fbbfd045df7a6df4dcf40eebd
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to redirect users to potentially malicious websites, including one identified as a game hack generator. The presence of numerous external links and a critical heuristic firing for malicious redirector infrastructure indicates a phishing or scam attempt. While no scripts were extracted, the document's structure and embedded links strongly suggest a lure for users to click through to malicious content.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/free-spins-october-28-2021-coin-master-game-hack In PDF document text
    • https://www.linzgau-kjh.de/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/free-spin-app-coin-master_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_003_off00004a6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6A 24456 bytes
SHA-256: cd0d95df9f833897cc0013e0c5f5eb0226703d61989516009418cd7834a10bb6
font_01_sfnt_off0000818f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 18656 bytes
SHA-256: ae43edb7d968773fa01f40288fe30e864a12c720900b1687a5763e30cc6382a2

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