Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f45fe30ebe41eef…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 07:58:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3c39de4042fa94f5b1b83bb07d39747a SHA-1: df12f5f6fd677c670ebc13f1d79db284560bfd2f SHA-256: 1f45fe30ebe41eefd33af345d94502fb44486427dbf54f806eef10fc726dbcde
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to known malicious infrastructure, specifically targeting users interested in game hacks and in-game currency. The document body explicitly mentions 'Welcome To Roblox Building Hack' and includes the malicious URL, reinforcing the lure. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users 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.co/app/431946152/welcome-to-roblox-building-hack-game-hack In PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/nuevo-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-gift-card-code-pastebin_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-change-roblox-name-free-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/treasure-hunt-simulator-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/slurp-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/new-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/comment-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-today-daily-links_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_off00003101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3101 22348 bytes
SHA-256: 62b740d63c19dfc1479f32a9c0d76875e585abb7d5f11f0d6dedaac7d7eb1354
font_01_sfnt_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 19548 bytes
SHA-256: a5193dc1e2aa88d8c5910f11dfbc7775fa7bc173ce9a4adc28baccd8ea244c5b

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