Malicious PDF — malware analysis report

Static analysis result for SHA-256 292b80125f4f6d1f…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 23:04:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4d1918578077eeacb98e4f34e4ee4aff SHA-1: 0e94f0d7180897cc7d4992e5a7d45b048d97c9a0 SHA-256: 292b80125f4f6d1f1ebffce8b5733866f053d87c4f5e4ee1de8e3bd04cdc9144
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to trick users into clicking malicious links by promising free game currency or hacks. The primary link directs to a known malicious redirector infrastructure, likely serving as a lure for malware or phishing. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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.online/app/431946152/roblox-free-robux-com-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-today_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_off000050f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50F0 27220 bytes
SHA-256: 7feb3e79822955c53b68ff3f048caa745f9cde7c07f870c181782bcbb5c87455
font_01_sfnt_off00008e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E99 18348 bytes
SHA-256: ea71f63ad969ac354b647f6e6da4581b14ed625e24a3109b04dcf91fda1e68c2

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