Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6156516430c869…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 14:23:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 62d26e51518d81d66415f61635fe7718 SHA-1: a5b01b3ae2993bca36016f08649b2a90bfe7e4ed SHA-256: 7f6156516430c869b08e633ccbf87a18a3dc28b000f797a0c5c7d0d932963430
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures for popular games like Coin Master and Roblox. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-free-spins-link-2021-hack-game-hack, which is flagged as malicious. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links, likely leading to further malware downloads or phishing attempts.

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/406889139/coin-master-free-spins-link-2021-hack-game-hack In PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/how-to-change-name-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/inject-hack-roblox-ingame-code_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-giveiaway-live_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/make-roblox-shirts-free_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/roblox-server-shutdown-hack_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-roblox-game-for-computer_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/roblox-build-to-survive-the-zombies-cheats_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/rise-of-nations-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/best-and-easiest-roblox-hack-for-robux_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-free-online-games_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
stream_002_off000033e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E5 22736 bytes
SHA-256: 4080dbef3b0382ed759b4568c43c3accac154b819218b0107ed40247b4ddbc9e
font_01_sfnt_off000066cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 18748 bytes
SHA-256: 8ee559f3b7bcb41d8d671c9caf17dff0473bece2e90a331a809c0197988e0d0c

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