Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbd1d739fed86dc…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 10:28:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7772a0da14b8c9b04249427c6cb6ad06 SHA-1: 1797597027f23e7eb84fef4fee87a3a9c210263a SHA-256: ccbd1d739fed86dcb1c8f0595795a027a8a97c271b650d01632c8dc4b04e7e93
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9865

Heuristics 4

  • 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-minecraft-resource-packs-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-go-free-808_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://education.minecraftIn 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_off0000552f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x552F 24860 bytes
SHA-256: b1fba67eb0c0f42a4cafb8816aa82b9ad882a3b7bf81a1ad7be1c73fdb259902
font_01_sfnt_off00008d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D92 18172 bytes
SHA-256: ba55ace67aaa42a75d72a76423215630d067bde5e330a1763dcb3073f08e6856

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