Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43abcb397824512…

MALICIOUS

PDF

45.4 KB Created: 2021-05-12 19:35:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9566383c23e72b7d21051b20ae4e15bf SHA-1: 3999e81a67144303f6f6c0f47f5e3287dee8a54f SHA-256: f43abcb397824512eb691201debb1d4870e35edee8f53eb4f300980450033a1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and websites offering 'game hacks' and 'free spins', which are common lures for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to malicious sites designed to exploit users or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-free-spins-link-2021-download-game-hack In PDF document text
    • https://kimolos-link.gr/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/instantrobux_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4C 24828 bytes
SHA-256: 167217f0c34d209ffa6146264b0e7d65d58fe1c3774f293008bb3d5c03903cc8
font_01_sfnt_off000082ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AB 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C96 19036 bytes
SHA-256: e0f8480fa6793c91ec869da5acb64ee4c254eeaf21d467085c584c7dc5eb632a

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