Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bb2a2d06639320…

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 12:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cc72c748f397025baac60788acdfdbf1 SHA-1: 865d3690946aee8959b5a0f6fa695e793ed27bb9 SHA-256: 69bb2a2d066393209211a6018955ef2ae57f141d064c829235455dc9acd65ea8
122 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. 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 0.9871

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/free-games-online-on-robloxcom-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/free-games-online-on-robloxcom-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-wheel_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_004_off00005455.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5455 32452 bytes
SHA-256: d7489781d563bab76291ae55ecb70d8b569485911582550d2369943500b9dc69
font_01_sfnt_off00009e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2D 18556 bytes
SHA-256: 67dc67f3c3fcc84cc1c428f9527001934366f1657e640e939f989b395f8d59cb

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