Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea4a1bf4cea64ef…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 16:09:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cfe024abc62bf4277210706547207044 SHA-1: 37c1dba99164f52cb00116b3bb20e9ffbc63f424 SHA-256: bea4a1bf4cea64efa4e3dd6b4cb3990b2a0492bb55311ce9a04453b6a596b484
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising 'free generators' and 'game hacks' to lure victims. These redirectors, in turn, point to other scam-related PDF documents hosted on the 'mohacad.hu' domain. The document body, though heavily obfuscated, contains references to these lures and embedded URLs, reinforcing the phishing and scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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/can-you-get-minecraft-for-free-on-pc-game-hack In PDF document text
    • http://mohacad.hu/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-gold_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
stream_003_off00004bec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEC 26088 bytes
SHA-256: 0937e7ed483a60e2e36bdee7f0fa9ae78825f4ad6d59dd44c9e3c62143fcdd1e
font_01_sfnt_off00008720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8720 18164 bytes
SHA-256: 8ea32a8e02995d89b02eafa4dcf94783bb214565530167096c35ff51f311a6e6

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