Malicious PDF — malware analysis report

Static analysis result for SHA-256 78dcbcae7e1a71b0…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 03:04:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 91a540587218a87ff659bca97a9d8073 SHA-1: 09f319d2644e520d3fb11e0c253db85fe6a92c9d SHA-256: 78dcbcae7e1a71b0ceef688057a3eb2b7b606ef2995788390a2c2727b26498c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.co/app/431946152/free-roblox-accounts-2021-game-hack. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/free-roblox-accounts-2021-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-i-get-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacker-vs-admin-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/money-hack-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-likes-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-polo-ralph-lauren-free-shirt_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/codes-to-enter-for-free-robux_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/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/1x1x1x1x1-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-hack-youtube-pc_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_off00003007.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3007 22724 bytes
SHA-256: 98019e00748af00a0c2941ac41d6365a49aba7d432e76b8c53944bb178c0acdb
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 19296 bytes
SHA-256: e80322954fcac7f4a2de879a7519f1815ce797af75ba555cfc46f0e031ec9aed

Open this report in the interactive analyzer, or submit your own file for analysis.