Malicious PDF — malware analysis report

Static analysis result for SHA-256 3434f08760d0401f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 20:29:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2eeb3990614969abbb655a4ab846880a SHA-1: d917f36604ebdc37b651f2bf4bb7021c95212901 SHA-256: 3434f08760d0401fae85808b2c853affb87764edb8e817deb8fdfb1335b6d0c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a generator or hack for popular games like Roblox and Coin Master. These links redirect to malicious infrastructure, specifically the domain 'netcdn.tw', which is flagged as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/431946152/how-to-get-free-robux-without-downloading-anything-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/roblox-robux-hack-apk-download_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/pokemon-go-free-like-games_GM1094591345.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/fnaf-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/youtube-how-to-hack-robux-within-a-couple-of-secound_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-sharkbite-hack_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-2021-edit-this-cookie_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-blogspot-links_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
font_00_sfnt_off00002f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 21924 bytes
SHA-256: afb3810b6b9548f97ef20a4dd0092e9d67c9de999f2590596b86a6003e5a8f72
font_01_sfnt_off00005fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB0 20064 bytes
SHA-256: b16c0b2685476b12d790c98b25c02402c4aa59cc1950d8e2b4913e5425ac04b7

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