Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22ba4b866733321…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 06:19:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 030a3daf86c8f58fb1177f1d36c7bfc1 SHA-1: 24842478593fd1a30e08dcd312e708f3a7f9327f SHA-256: b22ba4b8667333217a8c835f80eda54a73f86ecc2e2e42e54c3fd1f9d80a0619
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that promise free in-game currency and game hacks, such as 'free Robux' and 'Coin Master free spin'. One of these links points to a known malicious redirector infrastructure, and another uses a raw IP address, indicating a high likelihood of leading to malicious content or malware downloads. The document's content and embedded URLs strongly suggest a lure for users seeking game-related cheats, which is a common social engineering tactic.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-robux-codes-for-roblox-2021-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/rblx-gg-free-robux_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-group-may-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/earn-free-robux-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/bleu-hack-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-no-hack-pc_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_off00002eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAF 22168 bytes
SHA-256: c2535c4954ff4095908bf0dceca7cf180be42130edfa6bf7c40ff74dc0b51216
font_01_sfnt_off00005f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8D 19364 bytes
SHA-256: f7387be430d45c83c3bfd83a73f20261ebf36218f0778b9d9eed0e7d6f5bbcdc

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