Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa697fc783ce8188…

MALICIOUS

PDF

44.5 KB Created: 2021-05-10 18:32:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2c785639c43f93bf6bd6cb3048f82766 SHA-1: f43d0bed223e379190cb874240efb7a2a2af6697 SHA-256: fa697fc783ce81886041f97d947c4ba3b2a042371005969ce9d1a8af9d1cb49b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 0.9632

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.xyz/app/406889139/coin-master-hack-cheat-generator-d-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004933.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4933 25712 bytes
SHA-256: f1ce95075058dd217e5f7344a82c61363f03086a1cd5e2a609ea2ded27c66276
font_01_sfnt_off00008232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8232 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE3 18052 bytes
SHA-256: 69e58de4fe57995ee3fde2136fe389d8145efd54ac3cf18bd53b540b229c712e

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