Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af79d2787a5d120…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 07:34:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0374765b83938b653a4f70eec0ee3945 SHA-1: 8a156a0bf4fa44ccda435523cd1094bbf74004ed SHA-256: 9af79d2787a5d12062e099ebccaa438fd047ea32c0c5a9ce35d450e15fcfb397
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a link farm heuristic firing, suggesting it is designed to redirect users to external sites. The document body and extracted URLs indicate a lure for free Robux or game hacks, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/free-ways-to-get-robux-game-hack PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/hack-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/blox-rewards_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-minecraft-videos_GM479516143.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_003_off00004c14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C14 26460 bytes
SHA-256: 70eec555018c50df8dc3333e5f01fff6126eb2ef0571d969fc4369ebef4607db
font_01_sfnt_off000089b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B7 18724 bytes
SHA-256: 4748f019d46a9554f00c7c8cf9bb59ec204dfb95bc520e2d25b5a7c8ef81b270

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