Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c1cd31cc8c2ffd…

MALICIOUS

PDF

33.2 KB Created: 2021-07-06 06:45:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 78c6a5246e9a055a908f14845fb78a9c SHA-1: 819a82d543f41bdaa99473514c279de02c1d46ee SHA-256: c2c1cd31cc8c2ffd9a9590977dc1dc09590a019253988f5c0ee500cbae3f0314
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to entice users. It contains numerous links to external PDF files and redirectors, indicating a phishing or scam campaign. The ML classifier strongly supports the malicious nature of this PDF, and the presence of multiple links to known malicious infrastructure confirms its intent to lead users to potentially harmful content.

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/431946152/free-roblox-svg-game-hack In PDF document text
    • http://mbbs.hr/files/how-to-hack-any-roblox-account-using-windows-command-prompt_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/como-hackear-a-una-persona-en-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-roblox-jailbreak-xbox-one_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/which-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • https://mbbs.hr/files/free-reall-robux-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-building-hacks_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
font_00_sfnt_off00002c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C90 22044 bytes
SHA-256: 1fa2c27971028eee36fba0fe4a98465a756807ee2e4a87aca3b3ecbc8d63adb9
font_01_sfnt_off00005d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D56 18764 bytes
SHA-256: 70fc6a01177e47c8c1a2cb5f0ff3cb11a20591fe23aa8591ad50d23bcd28ad68

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