Malicious PDF — malware analysis report

Static analysis result for SHA-256 242bc6f4526d0200…

MALICIOUS

PDF

32.3 KB Created: 2021-07-04 08:35:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 21b8793281a7b60a7016699ebab376dd SHA-1: 4a9d5d0a615dcc7ccf976c8b30fac2edab994f29 SHA-256: 242bc6f4526d020006866419d21e375a2454944cd2a7eb364878dca9f638be45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The ML classifier strongly indicated maliciousness, and the presence of a visual download button further supports a deceptive lure. The document's primary function appears to be directing users to potentially harmful websites.

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/479516143/free-minecraft-com-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-anomaly-breach-items-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-works-100_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hackers-tshirts-images_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/emperor-hacks-roblox-discord_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-inspect-element_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-longest-super-fun-obby-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-page-no-human-verifaction-no-surves-no-email_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-god-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/shirt-ash-on-roblox-free-on-shirt-free-on-shop_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-sand-simulator-infinite-backpack-code-hack-android-noscript_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/spin-free-coin-master_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
font_00_sfnt_off00002ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC3 20752 bytes
SHA-256: dbd1ce1ca17b0af3023f6529fbce524f468c1aa0f9db5ba52053de2bf4ce95ca
font_01_sfnt_off00005b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B68 18260 bytes
SHA-256: caf027f2ba7eab55ccda80ce4a32e0bdd0518a11b2f9a87787e371bc5019346d

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