Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7cc5145228424d…

MALICIOUS

PDF

35.3 KB Created: 2021-06-29 13:38:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cc3e787b3ec99baa780368e7c3645f9c SHA-1: 21c84e390c858f68117dfc3819924e566975b819 SHA-256: 8a7cc5145228424da8e8dac9a4f34d2bf326e62f11931ad42f7d7457a323ddd9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to malicious infrastructure, masquerading as game hacks and currency generators. The document body and embedded URLs explicitly promote these lures, aiming to trick users into visiting malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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/how-to-hack-and-get-money-on-roblox-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-link-2021_GM406889139.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/how-to-get-2021-robux-for-free-proff_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-how-to-cheat-in-currency-in-games-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-roubux-for-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-cheat-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-without-quizzes_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-hacks-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/best-free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-phantom-forces-jump-hack-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/city-life-man-roblox-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-hack-apk-download-pc_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-shirt-template-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/hacker-des-personne-sur-roblox-pc_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/best-free-minecraft-skins_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_off000030f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F6 22844 bytes
SHA-256: a999f5c6190e55c8c1d7d19f37edc60c00d1e0731d6e0b4352a61b26ba2c563c
font_01_sfnt_off000063b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B7 19472 bytes
SHA-256: 47c5a4886c4c733c4fba5b4888cedf26f1c62df16baac1286ed0c2524e4e6ec9

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