Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbd151abd234b34…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 00:06:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ead2bde9b456aecdb47d5f9513dfbb8c SHA-1: 7febf5bd6c0339e2aa36e4e8ebe34a1aebc27bc3 SHA-256: fcbd151abd234b34ebd1c2ed697114f13133b0846478a570dcb2812b9b2d65a5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, masquerading as game hacks and generators, which redirect to a link farm of other PDFs. The primary lure appears to be related to obtaining free in-game currency or hacks for popular games like Roblox. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a deliberate attempt to direct users to a network of potentially harmful 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/fbchampion-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-dragon-ball-rage-hack-script-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hawt-sauce-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/pokemon-go-free-daily-remote-pass_GM1094591345.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-get-com_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-converter_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-glitches-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-remotes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-account-hack-2021-works-next-video-with-proof_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-admin-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/everythings-free-roblox-mm2-uncopylocked_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-generator-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/easy-roblox-hacks-not-malware_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-daily_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_off0000306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306D 22648 bytes
SHA-256: b368957d0457332caa92124ead7018f7bfccc42e5248d62dfe0c5f45b29431e5
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 18656 bytes
SHA-256: fb679c9250522cab0344be15c9898f12ed930a7de6dfe2591d59bad5f2ca43f7

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