Malicious PDF — malware analysis report

Static analysis result for SHA-256 0434cce1436c3d1e…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 04:40:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7a23f2441afda6f24afb0335935c1908 SHA-1: e463938a1036cc0e72c6bda42f3cf65ac2dba453 SHA-256: 0434cce1436c3d1e05b72015cc77391254b0eef1ae0212f0195db9c3a27491fd
160 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free generator' or 'game hack' content to entice users. It contains multiple embedded URLs that redirect to further malicious PDF files, indicating a chain of lures designed to lead the user to a compromised site. The ML classifier strongly flagged this sample, and the presence of known malicious redirector infrastructure confirms its malicious intent.

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.tw/app/406889139/coin-master-hack-spins-android-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-appvaley_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-clothing-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-codes-that-haven-t-been-used_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-roblox-on-ios_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-needs-password_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/como-hackear-una-cuenta-de-roblox-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-hack-tools-in-all-games_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-play-paid-roblox-games-for-free-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3302 22728 bytes
SHA-256: 8d100082e080f5daec3ee2ac477f0b9c9fedeb74439c033272099a7d56a3c9f3
font_01_sfnt_off000065ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CE 18352 bytes
SHA-256: 2cabd5c6fa7df02d72a1c529c27da7cbf2252fea49db4002903c87b12d8b4eb2

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