Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cf526c3477d520…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 06:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 12d01586a8829fe4daaee2a0f02247ba SHA-1: 7bc59bfdcbd2bd35de73b31aa7fceb476bca074e SHA-256: 06cf526c3477d52059992a81b9aa0bde2f4aec7d31a5f863c5158e77f44acf2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, specifically targeting users interested in game hacks and free in-game currency. The document body and heuristics indicate a lure for free generators or game hacks, which is a common social engineering tactic. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/roblox-how-to-play-bloxburg-for-free-game-hack In PDF document text
    • http://m-sv.net/images/minecraft-client_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/robux-link_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://m-sv.net/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/free-robux-no-offer-real_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
font_00_sfnt_off00005036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5036 25604 bytes
SHA-256: 81add501b12a7c7f8a703476652c8a4b36b6d72b1654535eb029beeeed4f752c
font_01_sfnt_off00008b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B93 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000957e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957E 19100 bytes
SHA-256: 22d061fd08c82945959e4d00fa603731fd4d8a421d9a742fb1943f661c438c0e

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