Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc85fa5c0e61aeb…

MALICIOUS

PDF

46.7 KB Created: 2021-06-13 17:53:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d1a9623214f6c91dc6b2898b2d3807a3 SHA-1: 39f0334b5a2234586d8f7c155c325ff00d2fee49 SHA-256: 3fc85fa5c0e61aeb5cb6092bcf4e8e443c74ab05624bfc1c08eec7ee001736ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack generator' which links to a known malicious redirector. The document body, though partially garbled, contains text related to game hacks and the malicious URL. The presence of embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.co/app/431946152/hack-jailbreak-roblox-7-february-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-robux-generator-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-pin-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-free-spins-on-coin-master-2021_GM406889139.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
stream_004_off0000502b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x502B 28500 bytes
SHA-256: 99b180dd144f63ba8e6fd0480f42107c7bae37db07080374723db95009dce748
font_01_sfnt_off000090bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BC 19408 bytes
SHA-256: 2fbc8e99fc10544617921a8da58db36573c8276f0bbab08aae0b25cd75a255df

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