Malicious PDF — malware analysis report

Static analysis result for SHA-256 a347ec9475819e65…

MALICIOUS

PDF

55.5 KB Created: 2021-05-14 06:08:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 15c7327aa05db1d554dd83a87694c139 SHA-1: c6c5150f519648e863ae518fdd4a4efd38dc1efa SHA-256: a347ec9475819e6589c8e01373e94f0faa0c19098140ef3200a9d71caed2f05d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a primary external URI pointing to game hack programs, indicating a lure for users to download further content. The heuristic findings confirm the presence of a link farm and a malicious ML classification, strongly suggesting a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links are designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

Heuristics 4

  • 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.
  • 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-hack-program-game-hack PDF link annotation
    • http://depilhome-fr.fr/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://depilhome-fr.fr/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://depilhome-fr.fr/images/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://depilhome-fr.fr/images/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://depilhome-fr.fr/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://depilhome-fr.fr/images/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://depilhome-fr.fr/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://depilhome-fr.fr/images/no-human-verification_GM431946152.pdfIn PDF document text
    • http://depilhome-fr.fr/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://depilhome-fr.fr/images/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://depilhome-fr.fr/images/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C30 26312 bytes
SHA-256: 609bf07ea1248f89479ae57555ebb0b4e44afba7bb60c17960a630652d8c2413
font_01_sfnt_off000089ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AB 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off00009476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9476 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79C 18416 bytes
SHA-256: 9b1b86d518bbcbecce2ac7037f2b10fa6fa9b3d2e28cf0c2cd03817ae8459785
font_04_sfnt_off0000c9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FE 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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