Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3699de6855704c5…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 09:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 066741f26cbd2b014c75025ef741db65 SHA-1: 4be166cda8a48276a415fb0055ee05d3753bc0ec SHA-256: f3699de6855704c568f9886a38d1dcf6f21314e8ed2dff1eef7b4f5485a815ce
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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) 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 http://netcdn.co/app/431946152/free-robux-sites-that-work-2021-game-hack In PDF document text
    • http://kulturlandschaften.eu/images/roblox-free-obc-thumbnail_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/all-free-promo-codes-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/wurst_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/infident-jump-hack-roblox_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/pubg-uc-shop-bd_GM1330123889.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/roblox-dragon-ball-z-final-stand-level-hack_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/corn-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-hack-on-roblox-jailbreak-ipad_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/wahoogaming-co-free-robux_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
font_00_sfnt_off00002db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB9 22144 bytes
SHA-256: 9873ae6d9e4eb7eea586aabc60a4463af4fb665bcaef7cb16361431dbd4af497
font_01_sfnt_off00005ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 19688 bytes
SHA-256: ccf7838a8f8ae3b855f8cbe464c4842e0a5c39c3c377eb08ea6a2656f75d173b

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