Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae9dc9d35e3a76f…

MALICIOUS

PDF

43.2 KB Created: 2021-05-17 08:17:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: badc59ab40517ead9d42544f952a8337 SHA-1: d2873a732dce10a972584c0bdcd778c0cdf2c2d9 SHA-256: eae9dc9d35e3a76fdd0b518008fb62225be85ceac44d43aba6b162caae6fa6b8
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 0.9969

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-daily-free-spins-and-coins-2021-game-hack PDF link annotation
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/robux-best_GM431946152.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_003_off00004bd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD3 25100 bytes
SHA-256: 73bdc9c1661c248cd2ffdd4dfc02de903321c4c80be7645983eee9394cb3f428
font_01_sfnt_off000084c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C8 18884 bytes
SHA-256: 183333dfce930995a9382150b407cb528e1a5d3dc22f511d9bca322a4b29e614

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