Malicious PDF — malware analysis report

Static analysis result for SHA-256 1476f3bcc21b6633…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 21:08:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1ad1166d6f229b07a4e6fb4081d8b9d6 SHA-1: f412d52a343356de2876d005c5d55e21b26cdf03 SHA-256: 1476f3bcc21b66339f38975aa2d8bc744afe8ab8de51af2e9ee394bcfe053c12
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector, designed to lure users into clicking for game-related cheats. The document body and heuristics indicate a scam related to 'free Robux' and 'Coin Master' hacks. The presence of embedded URLs and the nature of the lures suggest an attempt to drive users to potentially malicious websites for credential harvesting or further malware delivery.

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.co/app/431946152/free-robux-on-computer-2021-game-hack In PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/views-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/gift-robux-com-free_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/roblox-but_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/ash-greninja-free-shopping-in-roblox-on-robloxshopping_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-hack-in-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-get-free-money-in-adopt-me-roblox-2021_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/actual-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-spin-free_GM406889139.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_off0000321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321C 22308 bytes
SHA-256: a7ed88aa714db6cea46b0560849644db4d03c26d1d8844a7818d0a32f6326f55
font_01_sfnt_off000063cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CD 19660 bytes
SHA-256: bcf91f1bda7a6e1b74205be4b8e2324b0294e54e38162bb80260e07e5524bf17

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