Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4684f3a92120379…

MALICIOUS

PDF

41.1 KB Created: 2021-05-17 00:37:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7dd288390d4d69c40e959049d7b074cb SHA-1: a368ca252c982eeaa47f96ad1750dd8c08e43600 SHA-256: f4684f3a921203795b9781f8f18144aa777f14e7dace57e74ca9a31456bf7644
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to malicious infrastructure, specifically promoting 'free Robux' and 'game hacks'. The document body and extracted URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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.xyz/app/431946152/can-u-get-free-robux-game-hack In PDF document text
    • http://escolaarboc.cat/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/roblox-person_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45EB 24268 bytes
SHA-256: 34d302e90f9f94104899a49aef89a1a349750e8cbde97f3e071fe31116a02762
font_01_sfnt_off00007d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5E 18532 bytes
SHA-256: 35bb0f01f69d1b5e790ed5f4c0eeb98998139975dc1eb58b588dc01b9002bbc1

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