Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de10f0c7e445599…

MALICIOUS

PDF

48.4 KB Created: 2021-06-09 07:56:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e0b6fa6c03ceecb2d1485101c1feb1a5 SHA-1: 6cc79adf6d0e804db0cd0a822388e4dab087a720 SHA-256: 5de10f0c7e4455997627b62c9b63514e04abfadcc0c9866f398ff089674251d6
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 0.9871

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/how-to-get-cinnamon-hair-on-roblox-for-free-game-hack PDF link annotation
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/roblox-build-a-boat-for-treasure-cross-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/download-hack-roblox-2021-fr_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/pokemon-go-5-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/5-free-robux-games_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/roblox-sword-simulator-power-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-apk-free-download_GM406889139.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_off00005319.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5319 30488 bytes
SHA-256: 93c66137e544e7320befae6534bc72771deac94b6e5e49fe4c8fd3219e349045
font_01_sfnt_off00009962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9962 18824 bytes
SHA-256: ec50ec9cab0fb87fbfa8e0a594740c4ed956a339018ba6af9c1d5cfe4ffc3bd3

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