Malicious PDF — malware analysis report

Static analysis result for SHA-256 2660508384db1047…

MALICIOUS

PDF

33.7 KB Created: 2021-06-20 02:54:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f34f7e8323f2a0e3938f35c2e975dfed SHA-1: 46b5b1ef873b5f941d961f7868da94b5ecc808c5 SHA-256: 2660508384db1047543d9c4362bcdeb29348599efbc48b7c2b7977aa181fbe37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'free generator / game hack' lure. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

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.co/app/431946152/free-robux-no-survey-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-flood-escape-2-map-test-infinite-air-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/youyube-how-to-get-free-robux-that-working_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/murder-mystery-free-code-knife-games-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-android_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_off00002f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9C 21496 bytes
SHA-256: e4228487445b0a56808abf6d94928b16a52ceed40a6861c92d2a743954b37d72
font_01_sfnt_off00005e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E92 19012 bytes
SHA-256: 4e4ee538de79ec7e4a2325d57c934275716f5f92a64f1321ae55620a5fe6760f

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