Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc14e0754fbff202…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 01:22:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8b02468468f15446728ef8068cc36630 SHA-1: 7b4fe3c7555b8953d08c5e0cc373161d0f0f06fc SHA-256: bc14e0754fbff2026ce244b420e4b29cc55f8da4cb03bcf974d38a869c84927f
220 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/479516143/minecraft-menu-game-hack. The document body and heuristics indicate a lure for game hacks and free items, designed to trick users into clicking these links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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-menu-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-your-friends-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-body-swap-potion-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/what-is-the-best-free-for-all-roblox-game_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-witch-hat-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-noob-vs-hacker-vs-pro_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/pastebin-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/best-anime-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacker-vs-noob-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/como-hackear-tu-cuenta-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-renders-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-open-inventory-hack_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_off00003172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3172 22632 bytes
SHA-256: 764d0a66e90a38d25bdafbe28a6363f0035db68d9032d60543cb197251ab6ef4
font_01_sfnt_off000063bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BD 17996 bytes
SHA-256: e5ec272d4a709838dc4598325a3b2941e6c0bcb5d50c3fd3cab45fc549eef473

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