Malicious PDF — malware analysis report

Static analysis result for SHA-256 d932057804927c77…

MALICIOUS

PDF

33.0 KB Created: 2021-06-27 15:04:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f87d2954e1f06656df6b325f164f8250 SHA-1: 3104bbb6f1dd0cb7b6afd0a9896544c49160aede SHA-256: d932057804927c77a1ba1211e65691d0c9b4df8af9f81e4218b0c0f7b934b82f
220 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to lure users into clicking on them by promising free game hacks and virtual currency. The primary link, http://netcdn.co/app/431946152/robux-hack-survey-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt, likely leading to further malicious content or credential harvesting.

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/robux-hack-survey-game-hack In PDF document text
    • https://bwsrubber.com/image/data/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/hacks-for-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-hack-a-roblox-account-that-had-no-email_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/tiktok-free-stuff_GM835599320.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-online-play-hacked-infinite-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/test-all-free-roblox-gear-free-admin-scripts_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-gamepass-roblox-script_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFC 21488 bytes
SHA-256: b5d13a0e699f810b9dcee57e6b57920d97776f1eceb1c54de42fea82b32cf75d
font_01_sfnt_off00005be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE3 19016 bytes
SHA-256: 923428129418076cfcf602e5d4a047d9c691c2d21a84f17f5ab86fa0e60a4b75

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