Malicious PDF — malware analysis report

Static analysis result for SHA-256 a052d3341a61e9b6…

MALICIOUS

PDF

41.7 KB Created: 2021-04-27 09:02:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 056efa35ca808e17821f89077b83ee13 SHA-1: 9d5007d9765603e624e0135542f86bcf47a78be0 SHA-256: a052d3341a61e9b6643fc7845e121514ba41e7d9ae31ddffb94742d10ebba38b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a call-to-action button, all directing the user to a malicious redirector URL associated with game hacks and free item lures. The ML classifier also flagged this PDF as malicious. The primary goal appears to be tricking users into visiting a potentially malicious site for fake in-game currency or hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/roblox-login-free-account-game-hack In PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-1-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hats-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-do-you-get-the-hack-no-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/cool-tshirts-for-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-hack-into-files-to-get-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-gift-cards-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-a-free-membership-on-roblox-useing-hacks.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/daniel-hack-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-i-got-rthro-packages-for-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-free-logiciel.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_off00004525.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4525 25972 bytes
SHA-256: 760f28bbca24b5289c37be3c74e2973a8f07cacded8ff54e40e66d6cba20c059
font_01_sfnt_off0000804c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804C 18600 bytes
SHA-256: 0eb7aaeb75b0eb61f2915ceed086250e40c5d9e07f240d3728c87d8db6d60f58

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