Malicious PDF — malware analysis report

Static analysis result for SHA-256 0513b499bc55e41c…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 04:41:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ef651f0340bf5f3671887ce56d09811d SHA-1: b76cd0d4bcee238f7565e68796e2b6b5d10c12e7 SHA-256: 0513b499bc55e41c9297cc0c465858e32ab1d5652761fe0969f0cefe0e4520af
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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.xyz/app/406889139/coin-master-hack-no-verification-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-safe_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000494e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494E 25492 bytes
SHA-256: f7974e8eaa65aee3f7650481a3471def7e4b7f8282c2a8a1c98e44a956a6cd10
font_01_sfnt_off000083a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D55 17848 bytes
SHA-256: 31edcb062e0c4d358e7699eb17481b8bb2542c8a2ca42b35e989066c8723d51f

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