Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32a97b499793fee…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 03:08:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4d237669e74560aaf1216c966240d7a9 SHA-1: fe40f758560c9001930c3b1b6faf820b477fd7f3 SHA-256: b32a97b499793fee591282e3b3ec9f3aa40b8a603c91f834553c71348ee59266
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 0.9432

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.xyz/app/406889139/moonactive-coin-master-free-spins-game-hack PDF link annotation
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-april-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E74 24944 bytes
SHA-256: 37bd2e0b4771fd924aa5c72779dd99814fb2dd20283e3964f02d30994c572e86
font_01_sfnt_off0000880f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880F 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off000091b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B0 18000 bytes
SHA-256: 607e24879c86e77aea2ecea8189ce1ac53cb07a44b728ea7b5016cea096443a5

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