Malicious PDF — malware analysis report

Static analysis result for SHA-256 9140cb8701116ca4…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 17:57:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 102fb2bc7f7afe951a4653279941d716 SHA-1: 2750e210c0b88fe9a045d4df16fca360ef70ac21 SHA-256: 9140cb8701116ca40be8e85034b4b2d2eeb820b059dae9b34c06c8dad157c044
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-cat-roblox-game-hack. The document body and heuristics indicate a lure for game hacks or generators, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing 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.co/app/431946152/free-cat-roblox-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coins-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/auto-clicker-for-mac-roblox-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-accounts-dashing-simulator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-2021-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-teasure-hunt-simulator-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-de-robux-2021-julio_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/https-web-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-new-free-items-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/john-doe-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00003216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3216 22948 bytes
SHA-256: bcd1ccd1593c3dbaa8162c7cf568d576479daeea7490475e3d83ce7ae266cecd
font_01_sfnt_off000065bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BB 18752 bytes
SHA-256: 137bf948af0ac902d170e87b580c323b5798e6d77558248fd589a7149f85c12d

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