Malicious PDF — malware analysis report

Static analysis result for SHA-256 918df31c34b98918…

MALICIOUS

PDF

35.6 KB Created: 2021-06-18 17:19:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9a1d28625a08cfa56fe936f2aec7daeb SHA-1: 2d9215f0314aae3a2e73c08ccea73c4499c9185b SHA-256: 918df31c34b98918a2aa153726a705171b3575c23fe5f0d5d183f01ae63b10ae
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are structured as 'game hack' or 'free generator' lures. The document body and heuristics indicate a strong attempt to redirect users to potentially malicious sites, such as http://netcdn.co/app/431946152/free-robux-hack-no-survey-no-human-verification-2021-game-hack, which is likely part of a link farm designed to distribute malware or facilitate scams.

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.co/app/431946152/free-robux-hack-no-survey-no-human-verification-2021-game-hack PDF link annotation
    • http://lamascheradiferro.dk/images/roblox-4-free-codes_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robux-money_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/tiktok-free-fans-and-followers_GM835599320.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/copy-and-paste-free-robux-items_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-naruto-final-bond-lvl-hack_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/knife-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-escape-prison-hack_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-blox-no-hero-academia-how-to-get-free-spins_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/claim-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-face-maker-for-roblox_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/boku-no-roblox-infinite-spin-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3038 22716 bytes
SHA-256: b558f2148ab77c6755f4a3fd43e17e19116000a6acdef7c2bcdcb028413783da
font_01_sfnt_off0000633d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 20012 bytes
SHA-256: a880d8acbaeadff71d1a26c10e72d18790dc1af5ebebaf114caecfb7c0f641fb

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