Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dee2a349c9bb542…

MALICIOUS

PDF

42.3 KB Created: 2021-06-14 01:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7f687cccbfebdc330ee86c479d7d3c8b SHA-1: aa335a0dfb71c1ec19f52ec84cc3ab8ca049d3da SHA-256: 1dee2a349c9bb542b28b42ff51be2cac422f8f44b43ea699408fb509602021a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or currency generators. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure further supports a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/pastebin-free-robux-code-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pokemon-go-free-event-box_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-roblox-cards-no-surveys_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/cara-ngembalikin-akun-roblox-yg-sudah-di-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/cheats-for-elemental-battlegrounds-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-without-sign-in-also-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spins-blog_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
stream_003_off0000493a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493A 24464 bytes
SHA-256: c05b60e3b59c2c9619b571eb663b901b40daab5d094558a888a738761b83e1fb
font_01_sfnt_off00008142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8142 18796 bytes
SHA-256: 38d3b9af5d6f76e8289c417d22f24f1ac2e4f9d9fa83436cff51287ce30d009d

Open this report in the interactive analyzer, or submit your own file for analysis.