Malicious PDF — malware analysis report

Static analysis result for SHA-256 5906648aeb34b39d…

MALICIOUS

PDF

32.9 KB Created: 2021-07-09 14:52:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 53e485a74952fa154627c8486e890e1c SHA-1: 3b3f7b148003c39658e5b81a5a4950f7fd218153 SHA-256: 5906648aeb34b39db997066ff7548490bd21b3eb3830f71b9e5a53fe058cf138
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which redirects to malicious infrastructure at http://netcdn.tw/app/479516143/minecraft-font-free-game-hack. This indicates a phishing or scam attempt, likely to deliver further malware or steal credentials. The ML classifier also strongly flagged this PDF as malicious.

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-font-free-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/tiktok-free-followers-generator_GM835599320.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-meme-hack-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-and-tix-website_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/can-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-for-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-robux-hack-2021-may_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/injector-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-a-person-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-legit-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-easy-fast-legit_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-jailbreak-how-to-get-all-cars-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-hack-tool_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_off00002f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F86 21608 bytes
SHA-256: 25c44ab87af7b030bff4a04acae716ec1d9eeafcca630118a99e3292b27153bd
font_01_sfnt_off00005ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 17996 bytes
SHA-256: 1349cd4e0d557016c08a9b992d3688fa2f7b3c2a17b956817b71236e999620b9

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