Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a1bb37399ce287…

MALICIOUS

PDF

35.6 KB Created: 2021-07-08 07:47:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a75ba3274622f6a249be5ef80ce60f42 SHA-1: 55d4e3e0b73f1aa729f29e3bd27ea81d7c0e14c8 SHA-256: 12a1bb37399ce287d43b2d8351b28608f0960c659113bf8aa2db1c3cc59c2538
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are disguised as game hacks or generators for popular games like Coin Master and Roblox. The primary heuristic indicates a 'PDF SEO Link Farm', suggesting the document's purpose is to drive traffic to these external sites. The embedded URLs likely lead to phishing pages or sites that host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-70-spin-link-today-game-hack PDF link annotation
    • https://privatearrangements.co.nz/public/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-do-you-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/hacking-coolrichytimemax-in-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/http-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-generate-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-an-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-roblox-hack-download-for-free_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-one-mill-in-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/can-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-character-wings-hack_GM431946152.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_002_off0000323e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323E 23192 bytes
SHA-256: be6d8e4dcd05b89f57ee431bbfc1111b53d08a671b20e816627977481cc330a7
font_01_sfnt_off00006696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 18764 bytes
SHA-256: 4fa46c54e4e6df46386589314325ac4b3db1a8a5ca68877220378a444f7326f6

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