Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8487e2ff39a1e2…

MALICIOUS

PDF

33.5 KB Created: 2021-06-25 12:17:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9ad4fdc863f7550a8a2869208bd6bd6a SHA-1: e307f2e2aded20e11bff97348abdf7bbe41ee3a1 SHA-256: bb8487e2ff39a1e214e213bcf50cb23665eab8bdf72f9e3661a173d22596f697
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document is designed as a lure, using the promise of free game items and hacks to trick users into clicking malicious links. The document contains numerous links to redirector infrastructure and SEO link farms, which are commonly used to distribute malware or phish for credentials. The primary malicious link identified is http://netcdn.co/app/431946152/roblox-free-domino-crown-game-hack.

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/roblox-free-domino-crown-game-hack In PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-valid-codes-2021_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-but_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-hack-tool-download-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-robux-no-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-grand-blox-auto-hack_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-make-your-roblox-account-cute-for-free-girl_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/pubg-uc-global_GM1330123889.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/download-coin-master-hack-tool-v1-9_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_off00002d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6B 21640 bytes
SHA-256: 45bd94a2d93dee8528321f7d4017fa43312ec286ef4378a6351360e25eca12b8
font_01_sfnt_off00005cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF2 19364 bytes
SHA-256: 9064a3c70da71642e42590b265643047d986b1a34ba965a4e85ef4d0d90c69c8

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