Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f8b78a2f2fdbef…

MALICIOUS

PDF

35.3 KB Created: 2021-06-30 11:04:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 54d020ef952160de0231684e49ff2742 SHA-1: aa3d9ff2e4f472222df2b61e05a9e00c3e49bdff SHA-256: 50f8b78a2f2fdbefce267442c0c429ffdcbfb98d5ff170bf1ec4eb589362ae6c
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 0.9980

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.co/app/431946152/how-to-earn-robux-for-free-2021-game-hack PDF link annotation
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-robux-cheat-engine-download_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-cheat-money-in-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/bloxburg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-hack-peoples-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/games-on-roblox-where-you-win-a-free-stuff_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/secure-payment-with-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/copychat-hack-roblox_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
font_00_sfnt_off000033b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B8 21948 bytes
SHA-256: adcaa991aa7886bb48aa27a3a9820fef32781902acb71218d8aa815aeb6a096d
font_01_sfnt_off00006437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 19284 bytes
SHA-256: b399ae733d7917559aeb38653f56690fc8d0842846df9d5376906f0eed96920f

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