Malicious PDF — malware analysis report

Static analysis result for SHA-256 406f747d2020349d…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 06:28:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 792c41db18ca49096df79c0785b11109 SHA-1: d318573eb18b483472d06bf88c4c02d0d48e3d46 SHA-256: 406f747d2020349d359d5bfdf7c85cf8ba2df5e9fda2511ad8a0cd2577fdf218
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks or generators. The document body and embedded URLs suggest a lure for obtaining in-game currency or cheats, likely leading to a phishing or malware download site. No scripts were extracted, but the presence of malicious links and the 'password-protected archive' lure indicate a high likelihood of a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-get-roebucks-on-roblox-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000506c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506C 24516 bytes
SHA-256: ea0a05300ab16528e4aaaf2666c699f73d430ca51b463b65494fc0cc55139cef
font_01_sfnt_off00008886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 3464 bytes
SHA-256: 8448cbfbff679a6c3a31c3a06aaa86246d2c4d1cc99860f0c2127063e594f089
font_02_sfnt_off00009409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9409 18364 bytes
SHA-256: 2b946b4d7a1998aebf51f19e9cbc0e13d461cd82a275ed989f3ac0cfcc0a4974

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