Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0437afdaeb4727…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 17:53:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6016b4d28007bee9597d2740bc3b8d3c SHA-1: 178968415857c64376f711ba6da46abd81e33766 SHA-256: ba0437afdaeb472772f1bc7e8bf3ed1f5a91f804019fb270b6e51c15152e2d2b
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 0.9824

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 http://netcdn.tw/app/431946152/free-robux-no-verification-no-download-game-hack PDF link annotation
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/pg-family-friendly-roblox-content-free-robux-2021-builders-club_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/roblox-virus-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/growbux-net-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-robux-admin-button-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/why-do-robux-hacks-ask-for-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-clothing-catalogs-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2pringsewu.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server_GM479516143.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
font_00_sfnt_off00002d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D65 22380 bytes
SHA-256: 401119f5f3c47e4899650ae84d10e8b14c939d4f33de66ec6c493facfd2360f7
font_01_sfnt_off00005f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 19652 bytes
SHA-256: 8dba42de70404ddf4ce7a70a40047468e67895e17bebeb66015d1708da090460

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