Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8e078d774b0bff…

MALICIOUS

PDF

33.6 KB Created: 2021-06-20 08:59:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fc22964f4d2cc135b1a11673172f5106 SHA-1: dc5fce6573d89f8ec811638362c4e0f2064f653e SHA-256: fb8e078d774b0bff28acff16607f45a88e4755d9af17caa305ae9fae92ea7c5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a generator for free game currency. The document body and heuristics indicate a lure for game hacks, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links suggests an attempt to download or lead the user to a malicious payload.

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/fast-ways-to-get-free-robux-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-robux-generator-2021-no-human-verification-scam_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/clothes-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-generator-without-human-verification-without-tix_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheats-roblox-meep-city_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED5 21308 bytes
SHA-256: 6a347ed925b3daaeda81458b2a80ede29df3383b30fd8cca2314bc769a00f92e
font_01_sfnt_off00005d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D75 19196 bytes
SHA-256: a14f75afb33d7d198edb6edf70891a9ad89edbda6f0dfb89adb33be9f1695ec4

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