Malicious PDF — malware analysis report

Static analysis result for SHA-256 59594bf72aaa719c…

MALICIOUS

PDF

49.5 KB Created: 2021-05-12 03:26:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7b88d9beea7a4287eef8ac68dce00d71 SHA-1: 900d7030a2abacc4667d5293b8c6d1589a82b4a2 SHA-256: 59594bf72aaa719cd389a924a0def7549b2d45ea28aa9af8ee58a205edbb6374
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 0.8642

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/coin-master-free-pin-game-hack PDF link annotation
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/getrobux-info_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bfb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFB 27664 bytes
SHA-256: 6578317bb0f66b04373683428ebcf11b64a4f8dd608c2393937b0e6eba422b97
font_01_sfnt_off00008af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 3244 bytes
SHA-256: d3f30f2509784841a22146b2dddbb4adacd6f76af711f6b8e0581c3f7ceec31e
font_02_sfnt_off00009616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9616 2852 bytes
SHA-256: f58a8a4766967f143c5ad0ce3770f8b16f6e1f096bdec44aba0d5cd728fe8be5
font_03_sfnt_off0000a020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA020 17864 bytes
SHA-256: 02fadad1d3060d8cc90efe651df955044664b66b71eb8aee6c0abc9b5b5299d3

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