Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e298cdca4ba5163…

MALICIOUS

PDF

36.2 KB Created: 2021-06-25 10:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a9f7ac10b97507ee51a37291e89f1633 SHA-1: 9f12c07837b25187b47a88cf4d42298be6442561 SHA-256: 7e298cdca4ba5163002bedf747c7e73411320c4dd1a68d15ee0a76196bddc724
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/funny-faces-for-clothings-on-roblox-free-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-hack-into-anyones-roblox-account-2021-june_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/unpatchable-new-noclip-not-cheat-engine-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-hack-generator-secret-hack-revealedfree-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/get-free-robux-by-joining-this-group_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/is-it-possible-for-someone-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-cheats-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hacker-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-how-to-hack-survive-the-disasters_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-ingame-item-hack_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_off00003623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3623 22404 bytes
SHA-256: 56843a230837d8aa330d56b825d2609ba67a30095a6b066995ea960e0c561ffa
font_01_sfnt_off000067d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 19360 bytes
SHA-256: cf43d80041714044be1607cee91e40b3cc66cd9d8895852fda36aefb08b16ac2

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