Malicious PDF — malware analysis report

Static analysis result for SHA-256 205b12397a069819…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 17:25:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ad0310bade7270a7a49924b76dd068f9 SHA-1: 1e92f0df4fbe95017f05a8796a4cc24e73cc8d2d SHA-256: 205b12397a06981971bda65b5fe89b0e952e92db36645cf8800ca7a1b3f25739
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and cheats. The primary lure appears to be 'free avatar Roblox' and 'coin master hack', directing users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a phishing or redirection attack designed to trick users into visiting compromised or malicious web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • 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.
  • 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-avatar-roblox-game-hack PDF link annotation
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-app_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/minecraft-pe-free-ios_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_off00004a14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A14 26500 bytes
SHA-256: f2f492208d73c6694f056a17baabf176a7f11cfa96be48ca6d9ab48edf808468
font_01_sfnt_off0000873d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873D 18396 bytes
SHA-256: b4dd3c4f3ffdeae702bf7cab5d0e67b2e51f16692fa370b224309c32516adec8