Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03174e6327d0ebe…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 01:33:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 64f3c976aa3131ee38544e108ecd09c2 SHA-1: a97d10972867e4668ac0091e0cce49e2e8444607 SHA-256: e03174e6327d0ebec78e827aee81013bcae471b13a5a29c62bcf8e472d728ae6
142 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. 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 0.9864

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.tw/app/431946152/free-cool-clothes-on-roblox-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/pro-pubg-xyz-uc-hack_GM1330123889.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/robux-website_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005025.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5025 28216 bytes
SHA-256: 26b0b4dda7c18860ca5fb4e5da6296a28a363a38489a639cae65442d826c612a
font_01_sfnt_off00009074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9074 18216 bytes
SHA-256: 1bb4089df865203fa308c4c1e09260749f7a4d698644f3c46306d9a30bdb4b5c

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