Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f5c7c6fff9246c…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 14:28:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2eadc37c58d4cd743972d9ecf2d99641 SHA-1: bd84801e81b74ec968a6c48458c6b6590e21afa6 SHA-256: 37f5c7c6fff9246c1dd8e896b94d9939022592fc79a4f3dae7e3c2f2370238a7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on what appear to be game hack or currency generators. These links lead to malicious redirectors and extensive link farms, indicating a phishing or scamming operation. The primary URL http://netcdn.tw/app/406889139/free-coins-on-coin-master-2021-game-hack is identified as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.tw/app/406889139/free-coins-on-coin-master-2021-game-hack In PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/boku-no-roblox-quirk-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-by-clicking_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/fallout-plasma-rifle-free-roblox-model_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-robux-hack-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/impact-hacked-client-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/xbox-one-roblox-lumber-tycoon-2-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/cheat-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/can-you-make-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/tiktok-free-wala-video_GM835599320.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-roblox-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-high-school-cheats-horror_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_002_off00003149.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3149 22800 bytes
SHA-256: 47dccdd326d94be2d83495519d92cff6ee072edac18457d06803331518829f6a
font_01_sfnt_off0000646d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646D 18400 bytes
SHA-256: bed343b2bd1f226d572eb4efd0842b7506c1f222f82179a57ffd65f3da1cc054

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