Malicious PDF — malware analysis report

Static analysis result for SHA-256 3154fef2cf7ce44d…

MALICIOUS

PDF

55.6 KB Created: 2021-06-03 10:55:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b39082cff5dae3a9dbcaa6de531ab38 SHA-1: d43b0fb63af222247fe37d7d99f18856988152ca SHA-256: 3154fef2cf7ce44d3ed8c77d8278c32c2d8a35edf09bf3f8500dac7846d81dc7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a 'game hack' lure, suggesting a phishing or malware distribution attempt. The presence of a link farm heuristic indicates a large number of external links, likely for SEO manipulation or to host various malicious payloads. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9341

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/479516143/minecraft-pe-hacks-ios-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005590.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5590 25768 bytes
SHA-256: 6516ccacb7341fa3fb809282e8a657e8515e6b6cfb3b8eb80643ac187a089687
font_01_sfnt_off00008fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEA 7936 bytes
SHA-256: 038829bc81e15b6024d2a75b24b2b95e916dd2d8797e4f87b867de59d61698ef
font_02_sfnt_off0000a915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA915 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A2 18036 bytes
SHA-256: fbc64332b03f0750ddeb2eacbb62e3ca259962fbc5170a7e54e3809c144f3302

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