Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dbcf4b0de3a90c…

MALICIOUS

PDF

43.1 KB Created: 2021-05-15 17:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 54d27305804e79f34f00ba3c375871ac SHA-1: 68cde7caba1af87d3dd4bb428c8bdc7bc3da6f7a SHA-256: a6dbcf4b0de3a90ca0c3def399a138b4357fd2e3b20ad0e93d0cc8ca254526db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering game hacks and in-game currency, such as Robux. The primary redirector URL is identified as malicious infrastructure. The document body, though partially garbled, also contains references to these lures and URLs, suggesting an attempt to trick users into visiting these sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/how-to-get-robux-fast-game-hack In PDF document text
    • https://farkas.de/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/free-free-robux_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/roblox-data-breach_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://farkas.de/images/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://farkas.de/images/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.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
stream_003_off0000477e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477E 27396 bytes
SHA-256: 7aafbd29eddb8ef09ab75c7cfeaf78040513d9a293a82e5cb16b8d3f1bba533f
font_01_sfnt_off00008544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8544 18512 bytes
SHA-256: 4dc4e0cad61ef76bfeae7ffde68b6df350db2c75fc0ee4ed4c08fe52eaa40496

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