Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2d59162cfc71ce…

MALICIOUS

PDF

34.6 KB Created: 2021-06-22 04:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 080641744b4c5f8af67de9d7bc6372f9 SHA-1: e37f390421aa4b6d40f49d478e04bfe297f6162b SHA-256: ab2d59162cfc71cee0c8c17743db5dedbcafba14ce4b89d8417eed7cf9e41327
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/how-to-cheat-on-roblox-tycoons-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/how-to-make-hacks-with-studio-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-pics_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/download-hack-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-cp_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/youtube-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/rbxnow-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-without-gift-cards_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_off00002f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0F 22736 bytes
SHA-256: e0a4c476bd57699d2cb981d0ce1da77864fd72db4dd6dc936613d57679cde44a
font_01_sfnt_off0000620f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 19100 bytes
SHA-256: a99c0a1c768d7579e32fbd7969211316551a6e111052258b6ade35f362d5c58f