Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a205ee3085f89a3…

MALICIOUS

PDF

44.5 KB Created: 2021-06-04 02:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d519d42dfcb42975ff7f899157bffbe6 SHA-1: f078953a5fc753ed5c733fe16c84d48a229e5201 SHA-256: 2a205ee3085f89a3cab05b972cb7fc6cf6408d60aa921388a6895ded27633f09
122 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and game hacks, impersonating Microsoft, and directs users to a malicious URL. The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a credential phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-robux-microsoft-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-robux-microsoft-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pokemon-go-free-event_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-robux-2021_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_off00004ed3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED3 25984 bytes
SHA-256: 476e2b02ec1d262359b3fe711db9d0480908bbf1e0fc4be90a7069fb02a06db2
font_01_sfnt_off00008ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE7 18436 bytes
SHA-256: 753f3f2a839cbba740b1165c82973d17105d10f1d8ffbf22e8371d7b58d196dd

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