Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0ad7a46d230d8a…

MALICIOUS

PDF

51.6 KB Created: 2021-06-11 07:52:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: acf044ebf3abfcd167990700f556f467 SHA-1: 6de77194d46cb7b0240b38da83c5fbb94975650f SHA-256: 4d0ad7a46d230d8ac5d3732bca3255602ba8e2a768d09ccd0310390de09f7a1a
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 0.9872

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.tw/app/431946152/roblox-games-for-free-online-no-download-no-account-game-hack PDF link annotation
    • https://javexglobal.com/image/data/files/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-free-download-unblocked-at-school_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/get-free-spins-coin-master_GM406889139.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_off00005198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5198 38336 bytes
SHA-256: adb42b045f9110bb892493c87c7da55b409c6cc1865d447e68c25b3549ca02e7
font_01_sfnt_off0000a49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA49A 19304 bytes
SHA-256: 1fac39745634a59b31e4a9a2e0659d1913312be73c3875838af302d2d359d12f

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