Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22339e519fab91a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 03:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7a90892a540983691d67a07ff4e3f5d7 SHA-1: 1f3ebfc04a5c89758b1e2c637d7262a2bd779893 SHA-256: c22339e519fab91a2903e9c6fc26aa5a33e457fdb1bec32cccc7e087678f12f3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hacks and generators. The primary link, http://netcdn.tw/app/479516143/minecraft-free-download-ipad-game-hack, is identified as a malicious redirector. The document also contains a large number of SEO-optimized PDF links, suggesting a link farm or content stuffing technique to improve search engine visibility for malicious content. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or malware distribution attempt.

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-free-download-ipad-game-hack In PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-how-to-free-robux-for-free-with-out-hacking_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-jailbreak-cheat-menu_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-build-a-boat-for-treasure-hack-script_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-cheat-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/unpatchable-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-using-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/a-promo-code-that-gives-us-free-robux-no-waiting_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-its-free-logo_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/como-ser-hacker-en-house-of-keys-en-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-put-a-hack-in-your-game-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/hacks-para-roblox-para-tener-robux_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/cute-drawings-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/robuxglobalcom_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_off00003183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3183 22740 bytes
SHA-256: 9f892fd69030e385845a541f78cedde549f79f3ed1467906b3490e3c4ff9db60
font_01_sfnt_off0000643a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 18756 bytes
SHA-256: 0ebe94f7e8850ff316d9561b78e23a87553ea9aff3f68e8d880c2f0b804d142c

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