Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddf74615e294181…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 13:47:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cb963be0848a196d15575914569babca SHA-1: 69e65190c7d7fc9d5cf63fffa94bc46188ce2f18 SHA-256: 0ddf74615e294181dc513b5b641da8e0af2cd2c10becf8bf562faec1e8d994af
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 0.9980

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/479516143/how-to-get-minecraft-for-free-on-laptop-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-admin-gear-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-jailbreak-speed-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-fly-hack-in-tower-of-hell-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-no-human-verification-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/https-mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/counter-blox-roblox-offensive-hacks-wall-halks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-merch_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacking-system-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-make-a-roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/infinite-jump-roblox-cheat-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/tiktok-free-movies-site_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-for-iphone_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
font_00_sfnt_off000036ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36CE 22572 bytes
SHA-256: 7851b86730ff4920cf465304d7a652d7b77e7d1804320dc298eea0e9495b14da
font_01_sfnt_off0000693b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 18336 bytes
SHA-256: b646d971b4a48de69496e79329de15073d264ed964b7577fdc93e7feb1447e1a

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