Malicious PDF — malware analysis report

Static analysis result for SHA-256 a183d94d65242953…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 14:24:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d072f75d8b394f4a20cdb00bf3948f5 SHA-1: 8b8264e1a642eb1b75fa35cc7ca61705fcd3f25b SHA-256: a183d94d652429533d809d094e820cf9034c7dcdfcc8885c6626671ed7cb970e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/give-your-self-money-in-games-roblox-hack-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/hack-executor-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-quirk-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-download-no-survey-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-can-you-get-robux-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/clover-online-roblox-gui-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-quick-and-easy_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-doumins-to-wear-out-of-game-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-game-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/glitched-things-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-online-no-signing-up-or-nothing_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-accounts-that-have-1-million-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-chat-bar-roblox-void-script-builder_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-without-downloading-games_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-murderer-mystery-2-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-human-verification-or-survey-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
font_00_sfnt_off00002df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF5 21628 bytes
SHA-256: 63392dcb24b7887c5c202242e9aa660ed7f426c9fab4e4c33444e5fd84e5f5ec
font_01_sfnt_off00005dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCF 19828 bytes
SHA-256: 82610bf1dbe919bb4f2e4faeaebd63e85ecf55a07dce8e4a72bce4e509fee3af

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