Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f820d6b26fe127…

MALICIOUS

PDF

45.3 KB Created: 2021-05-12 08:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 41de51a07718ac437d3e32460f3e3a2f SHA-1: 07dd3e2c0d00bdfdc1e8471da1ef0aa94d67792b SHA-256: 52f820d6b26fe1279e3193df9153daf4ebe474cf792db0cb651470e89b598406
200 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, presenting itself as a guide for game hacks and free in-game currency to lure users into clicking malicious links. The document contains multiple embedded URLs, including a known malicious redirector at `https://netcdn.xyz/app/479516143/how-to-use-wurst-game-hack`, which likely serves as a gateway to further malicious content or malware downloads. The 'ClickFix' heuristic further suggests that the document attempts to trick users into executing commands, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.
  • 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/how-to-use-wurst-game-hack In PDF document text
    • http://beagle-cindy.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/corn-master_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://code.giftcards.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bfa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFA 25272 bytes
SHA-256: a0fc8dacdba773b0f8a008adf949aeebe19e462d76eeeff9d5cae1d91c767a44
font_01_sfnt_off0000854e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854E 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5E 18052 bytes
SHA-256: a68273e95d9ad8d33f951bd54b666654e65060786c21df7f799ba901f89a275f

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