Malicious PDF — malware analysis report

Static analysis result for SHA-256 21009213ee805ed2…

MALICIOUS

PDF

53.4 KB Created: 2021-06-03 21:37:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 84c592ec41d77eb8c6508a338981d383 SHA-1: 8114ccc2bb4de8261604c71c4a790b69cc65b78e SHA-256: 21009213ee805ed220e83b36f545322ed90ad7e4268ad4c5d58c548f5ae72f12
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-arsenal-hack-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9577

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 https://netcdn.online/app/431946152/roblox-arsenal-hack-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-free-stardust_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiktok-free-vs-paid_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-bedrock-edition-hacks_GM479516143.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B0 26360 bytes
SHA-256: 24b09fcb94799670c0bebbfb23c5fcac2ccbb0e230b9faddf7bb20e525da1039
font_01_sfnt_off000090fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90FB 4660 bytes
SHA-256: 465209964a09586ac5022a8b8e85d53299c19051a953d4aa9891341d9cc85b22
font_02_sfnt_off0000a10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA10A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000ae1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1C 18184 bytes
SHA-256: 950cb6c94e3217e8d5edf097fa87367098c5f84c9f1c4255a513a3effc23c56b

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