Malicious PDF — malware analysis report

Static analysis result for SHA-256 2995e9f37b56c62f…

MALICIOUS

PDF

49.6 KB Created: 2021-06-03 08:30:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a695567c33b897228fc1f31a2d0cc16a SHA-1: b85605a0f131f6032d26345d69cab791c375c316 SHA-256: 2995e9f37b56c62f4e9c472fe82b37d9a3d51cbd6e7cbc3a71d42484a5f4431b
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency generators to trick users into visiting malicious websites. The document contains numerous links to external PDF files, many of which are hosted on compromised legitimate websites, and also directly links to a redirector URL. The presence of these lures and the redirection infrastructure strongly suggests a phishing or scamming campaign aimed at driving traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9751

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 https://netcdn.online/app/479516143/minecraft-free-download-laptop-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CB 25056 bytes
SHA-256: 4f725c7b4f1ee44574b2f7fc94c289961a9f874ce6e7084baf2e4a11f6644e59
font_01_sfnt_off00008a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A03 3020 bytes
SHA-256: eedce20c19bed174ebe453a0c0095ca54ef1c0cf763914f699a20348cea05fc2
font_02_sfnt_off00009457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9457 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00009e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E68 18464 bytes
SHA-256: 6197069052dd1f902b9484e0bf6d7537b85552f28950007395536a6c9025e818

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