Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c98845015cec63…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 07:16:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1d358373de028abdff25560297aa07a5 SHA-1: 86c16f1d23284476a0f369a6a66ae7fe278f9647 SHA-256: 58c98845015cec634bd59ba8e3681a88a24f2975eae481514082d9d3f5c9dce4
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document employs a social engineering tactic, presenting itself as a 'free generator / game hack' to entice users. It contains instructions consistent with ClickFix attacks, guiding the user to execute commands directly, likely to download and run a second-stage payload from the embedded URL. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • 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
  • 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-pocket-edition-free-apk-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiktok-free-netflix_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-700-site_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-tiktok-likes-2021_GM835599320.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_004_off00005001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5001 25076 bytes
SHA-256: 3962589b0f67ecf90d9940b5e2e8e5d406919f336d3b7b8c00bf0d49779b583e
font_01_sfnt_off0000897f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897F 18384 bytes
SHA-256: d3d1d430428c73896de9795e5eeef6e82810e36860bb7f8fcd97e9577ce89645

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