Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca0e92685e7b92a…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 07:09:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a3d0fa5457519c7c86f9d2ab46a6ac05 SHA-1: 82bc644902f411ec5ba7f404dc83048b84d2f5f7 SHA-256: 4ca0e92685e7b92a7e2ea5032689a0513f7ca594519288f80350ce1f0e39f8a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' and 'free spins' to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts multiple other PDF documents with similar lures. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at driving traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-2021-game-hack In PDF document text
    • http://arkivthy.dk/images/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/static-moonactive_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-hack-coin-master-spin_GM406889139.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
stream_003_off00004b78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B78 25472 bytes
SHA-256: 2a3633ea57df6d033e4b504ae9eed730197326e4949de13620bb536a0f3a3411
font_01_sfnt_off0000843d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843D 18116 bytes
SHA-256: 17974cef81917e5ef69542194afa433aff210173cc902887fbc2b56a9328dd03

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