Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a950f1ce1a5cb2…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 11:34:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2468d0e315f00b71f609e24509884715 SHA-1: 13c01b5ccf56655c175438d251ddc7c138892241 SHA-256: 80a950f1ce1a5cb2bb3786ee0fc29be5acbc2c1854c9be8bfbfdf7aeaca4f9b2
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.tw/app/431946152/wahoo-gaming-co-free-robux-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/i-think-someone-tried-to-hacked-my-roblox-account_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-mexican-flag-roblox-tshirt_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-a-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/are-free-robux-games-botted_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-400-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-code-robux-no-fake-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_off00002dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD3 22872 bytes
SHA-256: 81dca11fcdb6cfcce1aafc945b20733b7b4b556df7f8ddf39e78759be7cccaa1
font_01_sfnt_off00006157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6157 19460 bytes
SHA-256: 25181eaa6be0d5b476285318664890f4926978dca9587ea82b488640a0a05646

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