Malicious PDF — malware analysis report

Static analysis result for SHA-256 e294fdeef6d426ab…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 09:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 25b183e9b6d78d962497475c8d00b6d8 SHA-1: 8d8365a26652851777408cda2665966ebf9e912f SHA-256: e294fdeef6d426ab92ce27edc40115dac11e69f5f5b615ac9a85f35ee23dd7c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The primary lure URL is http://netcdn.tw/app/431946152/roblox-free-robux-no-verification-game-hack, which is designed to entice users into clicking and potentially downloading further malicious content or being phished. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a social engineering attack.

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/431946152/roblox-free-robux-no-verification-game-hack In PDF document text
    • http://mbbs.hr/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/vesteria-roblox-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/cheat-engine-roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-hack-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/hacks-for-roblox-v5-fast-and-furious-updates_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-clothes-no-robux-of-friends_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-and-tix-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/cheat-cash-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-mega-fun-obby-cheats_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/pubg-uc-price-in-bd_GM1330123889.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/is-there-a-free-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-link_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_off00002fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA0 22444 bytes
SHA-256: 73fe06b0251b6bd4215742cd9a743f6467bf0fbd9bd56e4a0274ad406bbf99bc
font_01_sfnt_off00006174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 19148 bytes
SHA-256: 8dddf83a8dc305c7bfb211f3bc3fbf3b1849d9dcf887b2c8b2fcb602871e3305

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