Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d00422f0bccdee7…

MALICIOUS

PDF

48.2 KB Created: 2021-06-04 02:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1fddb254266547f6052463e787773d6d SHA-1: 5e1996003796c6016877d23fc8ca1355020c2607 SHA-256: 5d00422f0bccdee708842e46a08450fec2958948d4cf673e62c7eee033162a24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The ML classifier strongly indicated maliciousness, and multiple heuristics confirm the presence of malicious redirector links. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest an attempt to trick users into visiting potentially harmful sites, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/how-to-get-free-robux-2021-easy-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005141.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5141 24952 bytes
SHA-256: aa6a40261ee8cd3c84cd5316e0da5bce09544d5ce630594f8c527b483c7ad4f4
font_01_sfnt_off00008a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3D 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off000096e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E5 19092 bytes
SHA-256: cc4041fc50bd2ea9a1268967e32916156e3a634973a216864dd7f220ceb04504

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