Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2ce3dde6c3c6da…

MALICIOUS

PDF

34.3 KB Created: 2021-07-02 05:36:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fd8bdca14915fcb085ad234fc6e6addb SHA-1: 3137aa11b606eb78a1b210f062bc5efa22541bff SHA-256: 4b2ce3dde6c3c6da36367cd41f3248cdb918e3e61f3e112003cfd1c5f5063687
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs social engineering by presenting itself as a lure for game hacks and free items, specifically mentioning Roblox and Coin Master. It contains multiple links, including a critical redirector URL, that likely lead to malicious infrastructure or further download sites. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document may also prompt users to install fake browser extensions or updates, a common tactic for credential theft or malware installation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://netcdn.co/app/431946152/roblox-pajama-pants-free-shipping-game-hack In PDF document text
    • https://www.ak-oroslavje.hr/files/increible-hack-de-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/dancing-sim-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/my-roblox-account-has-beem-hacked_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-50-robux-free_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-make-free-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/minecraft-free-exe_GM479516143.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_off00002d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D80 22244 bytes
SHA-256: d88ffec7a05ec7a10cac2a092b0ce9bbbe5b88bdcf9392f11b58443cab2606b5
font_01_sfnt_off00005f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F11 19816 bytes
SHA-256: b784693d588e3f4f065b96a356daac8c35786e9b504eab4a1ec594f32780f15b

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