Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65fd3f7bb222df9…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 02:04:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9cd7912a33c95bca0a24896b7f1b7000 SHA-1: 9a9b050881627277999212c9145ce7ddb1959e89 SHA-256: a65fd3f7bb222df93de562d26b6fddfc1cd138a774af5d85c7e6faee42f62d51
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, identified as a link farm, directing users to websites that promise game hacks or free accounts. The primary lure appears to be related to Minecraft and Coin Master. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious sites, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/free-modded-minecraft-server-hosting-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-link-may-2021_GM406889139.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_off000051cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CD 25260 bytes
SHA-256: 5c168d7ff33fc2211ec097230034ee5fb438a34e796827625b55dc40dd368d89
font_01_sfnt_off00008b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B17 18284 bytes
SHA-256: 4ae19380f71872a59bca81a6826a2f1ac99dae3e110f9987d961b4518a9677d8

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