Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34a1e88868a99ed…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 14:20:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 00ae3b34763bca58cc218cbbba64c61a SHA-1: 0de19d1e0323cfba56ea860e2d972ce514ab4165 SHA-256: c34a1e88868a99eddf48057b307fec7351d10f4bde515c0e4158349192a95dce
182 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9865

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/roblox-bio-hack-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/pokemon-go-basic-vs-premium-rewards_GM1094591345.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-aand-true-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-teethyz-dentist-how-to-get-free-points_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/flame-gg-free-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000509f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509F 26892 bytes
SHA-256: 73c7ba1f1d2a4607ba0d90ff66cc5e7d60d1c57ee47842ab649138b53b53f0ca
font_01_sfnt_off00008d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D73 18300 bytes
SHA-256: f5b74110292517f4ebf9c9d33fedef6b4f228b0d34b95408017ef062ceee5f57

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