Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d6f370537062c8…

MALICIOUS

PDF

44.9 KB Created: 2021-05-14 00:52:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 90816cc7d83c8477109798bd8ae5d302 SHA-1: 05f4f8d29bfec78ceab7c9461fe9963b7d4dba3a SHA-256: f0d6f370537062c874bbff3c3d888f3f0fd68a619dcbc2ce164a23cc68b98aac
260 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and a large number of SEO-optimized PDF links, all designed to lure users into clicking. The document body, though partially corrupted, contains text related to 'free Minecraft Capes' and 'game hack', aligning with the 'free generator / game hack' lure identified by heuristics. The SE_CLICKFIX heuristic suggests the document may also instruct users to manually execute commands, further indicating a malicious intent to trick users into a harmful action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 https://netcdn.xyz/app/479516143/free-minecraft-capes-game-hack In PDF document text
    • http://mohacad.hu/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/getrobux-come_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://education.minecraftIn 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
stream_003_off00004b10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B10 30404 bytes
SHA-256: 8b1b300b2ebb5d7ecd48172be7027ee47445ea8519c15394c51f7748bfe24d18
font_01_sfnt_off00008f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F01 17744 bytes
SHA-256: dedc931f5c8bac627c7a83c769fddbd093390c6d69f02f50ba531346133b4d17

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