Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde6adacc94d7b89…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 11:54:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7aeeac3c3f4da457447c1745a3ed32d0 SHA-1: 5e224eeedefa2c1b8b7f35895b5e78297f5a4650 SHA-256: dde6adacc94d7b89d5ddbbd942ee8a1ae49c53dfcab233aaa4d9b91595ba9783
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The heuristic firings indicate that the PDF links to a known malicious redirector and is associated with game hack lures. The document body, though partially garbled, contains the primary malicious URL, suggesting the intent is to trick users into downloading potentially harmful software or visiting compromised sites.

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/minecraft-apk-114-game-hack In PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/block-best-robux_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/comment-hacker-roblox-pour-avoir-des-robux_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-hack-roblox-sites_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/hack-roblox-diamond_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-you-get-free-robux-hacks_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-roblox-accesories_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/is-free-robux-fake_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/comment-hacker-robloxe_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-get-free-robux-hack-without-human-verification_GM431946152.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_off00002f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7E 21460 bytes
SHA-256: ed018428f55e25f900868fabfe6ae216d52d7bd2dc5a024ef5f963329cd4a720
font_01_sfnt_off00005e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E50 18372 bytes
SHA-256: cfa1744e15de76beef4250e2e8e5213b12ebb5623f2a1aca1772815b9c3f87cb

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