Malicious PDF — malware analysis report

Static analysis result for SHA-256 acad9536fd41fb12…

MALICIOUS

PDF

46.9 KB Created: 2021-05-11 20:36:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cbe25631c93df09bdf0dedb040e0a41e SHA-1: 937f35e8a0a9d11747852f2a8ac0215bbcf49965 SHA-256: acad9536fd41fb12193887b5be8652ce7941527cd220a6d4f1a868effb84773a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.8948

Heuristics 4

  • 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/free-coins-and-spins-coin-master-2021-game-hack PDF link annotation
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/www-robux-com_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C7D 26652 bytes
SHA-256: 23ed98f212d764686b9e4d87670968b60e60c1574a900bae6f57613a36cfae56
font_01_sfnt_off00008930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8930 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off0000940f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940F 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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