Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b658a36ef408f1…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 14:03:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f098ab58d2cc961db955f27668eab4e4 SHA-1: 1b2ce04c6b6b1b6c66a1ed0ada682638b2aa3bce SHA-256: 94b658a36ef408f16f7656a939f5d92237e7ac997e3ad8d2923de457cf78f183
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing and a callback-phone (TOAD) lure. The file 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 0.9832

Heuristics 6

  • 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/479516143/free-minecraft-mods-game-hack.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/free-minecraft-mods-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/freerubux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-and-coin-blogspot-com_GM406889139.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_off000053b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B3 29040 bytes
SHA-256: 3bbadc2a61a8984c7306b2a85fa03fc0cea6a02d349a87f0620f549d1b6b8d2d
font_01_sfnt_off000093ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FF 17884 bytes
SHA-256: adaa6c4c94b3243dd254ffbddf76305537cf905bb6459c29a6343236798c761b

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