Malicious PDF — malware analysis report

Static analysis result for SHA-256 668c04f42a9034e2…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 01:50:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 58b47604ee5f81fd64f70291748938ca SHA-1: 6d77270d6be2f35af696bd4b6d60d22f94cc7421 SHA-256: 668c04f42a9034e2de87d4b4cf87a7481465199030da1864b5aee5d53626e47b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The primary redirect URL is http://netcdn.tw/app/406889139/today-free-spin-coin-master-game-hack, which likely leads to further malicious content or downloads. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, potentially for credential harvesting or malware delivery.

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/today-free-spin-coin-master-game-hack In PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-hack-roblox-fe-games_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-level-up-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/is-pokemon-go-fest-free_GM1094591345.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-free-shirts-id_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/if-roblox-was-free_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-robux-in-promo-code-2021-april_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-more-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-can-i-get-free-spins-on-coin-master_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F39 22736 bytes
SHA-256: abf0e016a7069197254a86afc2c5d37fd159537b4934951e469831d86ffe0d6b
font_01_sfnt_off0000625f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 18528 bytes
SHA-256: f8dd2954f0f3bcbf2df1f6258498c603c5a9fb04d130006050f95c06de5614fa

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