Malicious PDF — malware analysis report

Static analysis result for SHA-256 8218ac03fa452c10…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 11:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 02d480831a20309c935864951681d96c SHA-1: c0617fac1cad65e373cf85e9044ee13269770917 SHA-256: 8218ac03fa452c100d68afab4d3a28181a7f1c9ffe4f5f21530282763a48465a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body and embedded URLs strongly suggest a social engineering tactic to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent through redirection.

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-hacks-that-actually-work-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheats-fro-csgo-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-dominus-hat-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/framed-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-and-limiteds-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacks-to-steal-robux-sign-up_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pet-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/50-free-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/notoriety-roblox-shadow-raid-secret-cheat_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-no-survey-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_off000030d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D8 23044 bytes
SHA-256: 115fde61cf50b6574d88b3fc651b94c2de1cf5ebb3f16d53eaf5e1494a6e8b28
font_01_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 18764 bytes
SHA-256: 186404235492714141fe178d852b9eea84aa2a2efb3b784b2ce6685dda24414c

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