Malicious PDF — malware analysis report

Static analysis result for SHA-256 133d9aecb2eb6c7a…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 22:33:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 235985fd420d8568f683d690280d1ca8 SHA-1: 5c2cc9e50b8d9bf1194ea378f2edc053c783c669 SHA-256: 133d9aecb2eb6c7a8326cc85279c46bc91597c6b0317f6923a83138ac050bf1a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free currency, impersonating brands like Microsoft to trick users. It contains multiple links to external websites, with the primary one being 'https://netcdn.online/app/431946152/roblox-army-robux-game-hack'. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to lead to credential phishing or the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/roblox-army-robux-game-hack.
  • 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/431946152/roblox-army-robux-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/pokemon-go-free-kanto-ticket_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
stream_004_off0000536b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x536B 26560 bytes
SHA-256: b6c8a76ed4bbceca66ee3e37ef5c7174d052fb43cea01e4832327ce76c3b935d
font_01_sfnt_off0000925a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925A 18364 bytes
SHA-256: f83d3f603b487845ac1519eb998e5a07fc623aec3eb3ec32811a52b67b594203

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