Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc1b354d5160a44…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 14:03:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 851e0661123b4385c855302cd796a00b SHA-1: f0b0c8d5b27cd7d0f686b7b18ed45de3afdf0227 SHA-256: 5cc1b354d5160a44f4783b534c0f7548bdb10d9585b05f8bbdbf724c45a0753a
142 Risk Score

Malware Insights

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

This PDF document employs a lure related to free game accounts and hacks, directing users to external URLs. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous linked PDFs, suggesting a tactic to distribute malicious content or engage in SEO manipulation. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to potentially malicious sites, possibly for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-accounts-2021-november-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/features-roblox-robux-hack-apk_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/has-roblox-been-hacked-before_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/best-free-roblox-flight-simulators_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hacks-for-roblox-for-rubox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-how-to-hack-any-accoynt_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/lua-script-roblox-lumer-tycoon-2-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-human-verafaciton_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-do-people-get-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-how-to-get-free-robux-2021-hacks-no-scam_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/get-free-robux-just-by-joining-this-group_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-speed-client-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-use-roblox-hacks-multiple-rbx-games_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-hair-boy_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
font_00_sfnt_off000030ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EC 22344 bytes
SHA-256: 07518c31beaa986ae662d64f5bc008be235f10fdd2e5d2fee25da9ef1278f873
font_01_sfnt_off0000628f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 19668 bytes
SHA-256: e475def7d1f4fa099fc1f91309e2f5a253fb8b20a018a3ccff13fa3ae83e45eb

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