Malicious PDF — malware analysis report

Static analysis result for SHA-256 4905b7a3b6beb151…

MALICIOUS

PDF

41.6 KB Created: 2021-05-17 18:39:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6cb1ace30f6be70c4f52d6af29efeb8a SHA-1: ab49812e2b0af1105c5a88383b55d6227a9b6f3e SHA-256: 4905b7a3b6beb151761386a1eba9311428cb3fe9f4b69c6758f91f027cb81b26
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-for-free-games-game-hack PDF link annotation
    • https://javisintlmedia.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/weird-roblox_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/abd-roblox_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-free-spins-cheat_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_003_off00004892.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4892 24808 bytes
SHA-256: c89cb58202dccd3c2e47b42f2c0d1cf50ed308ad6269d858c87b68af4273eb17
font_01_sfnt_off0000816e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816E 17968 bytes
SHA-256: 9a9d2dfa5c0c54fa5ffdde25f1de4b21c6a9e15afbe55fd2a9ef8b08bad6b0a2

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