Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb9f9922bee3c16…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 12:27:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 72dfde24c656710f82c7fbd29745201b SHA-1: 453833f6a5f86c5f3755c26b3fb3ea3fd7265914 SHA-256: ddb9f9922bee3c166d1f15644b69930da95de73a9d23ca5318da16e2cde83419
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, promising free game currency and hacks. The document body and embedded URLs strongly suggest a lure for users interested in game exploits, likely leading to a phishing or malware download site. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-free-robux-codes-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-robux-without-survey-and-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/mobile4free24-com-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/atlantis-overlord-bubble-gum-simulator-cheat-code-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-any-item-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-tycoon-hack-scripts_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-teleport-in-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robuxy-com-free-robux_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_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 22548 bytes
SHA-256: 300c141996418e9823a3746753c7d1e1e12f035a40c5b12b1c0e535674892904
font_01_sfnt_off000062db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DB 18964 bytes
SHA-256: a55805342354896b15de53c372ce6b4f67675692ecef428388acdddaf3dfd905

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