Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f423a780715dcf…

MALICIOUS

PDF

49.1 KB Created: 2021-06-09 15:20:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5a8b62fe0a4605b188e2df8fb8a5609b SHA-1: 5a4a5044080d5394628dc050182103ae8c06735b SHA-256: 57f423a780715dcf6fe3d3f8e9c6969616a471b50805cec355a467fff641006d
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'generators'. The primary lure, 'fly-hack-prison-life-roblox-game-hack', redirects to malicious infrastructure. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to trick users into visiting malicious sites, likely leading to further exploitation or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/fly-hack-prison-life-roblox-game-hack In PDF document text
    • http://lcs-schlieben.de/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://lcs-schlieben.de/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://lcs-schlieben.de/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://lcs-schlieben.de/images/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://lcs-schlieben.de/images/free-roam-roblox_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/android-1-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/adidas-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lcs-schlieben.de/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://lcs-schlieben.de/images/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://lcs-schlieben.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lcs-schlieben.de/images/big-games-free-pet-roblox_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://lcs-schlieben.de/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://lcs-schlieben.de/images/free-robux-hack-no-human-verification_GM431946152.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_off00005330.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5330 26812 bytes
SHA-256: deb7c2c0397775e27fbe861dfc9cf438b198da82a8d2b984a88ff8e7f17e0aca
font_01_sfnt_off000091a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A6 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB6 18800 bytes
SHA-256: ae5a1515e7aa7adc6ce42e89504f98d324ffa375040023bf3df90a45433824b9

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