Malicious PDF — malware analysis report

Static analysis result for SHA-256 586ce686649a28af…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 16:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3a4f2b170e0463189b18423afb34cb3c SHA-1: 775c6f31337bbabe4f17417c87f48af0b6fde61f SHA-256: 586ce686649a28af4b8b638b29247fb8df2cce12d9387370aa6736059144ace7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, including a primary redirector for 'game hacks' and a large number of SEO-optimized PDF links. These links are designed to lure users to potentially malicious content, such as the 'minecraft-bedrock-hacks-game-hack' URL. The presence of a visual download button further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • 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.
  • 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.online/app/479516143/minecraft-bedrock-hacks-game-hack In PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/www-robux-us_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/wurst-hacks_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.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_004_off000051ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EE 25908 bytes
SHA-256: de6de3876a13d107ae7a1941af9d0cc69ef86b59e95a30c4fc9f36cdbe6ed9a4
font_01_sfnt_off00008c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0F 18268 bytes
SHA-256: cdc10c07562964e95d3c60cab3c6d937b43618c1a43ea86bc4060c2923515875

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