Malicious PDF — malware analysis report

Static analysis result for SHA-256 655e31b16ac55c1a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 04:10:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c1a41a06e00bdcda92b674bdfe0a61ac SHA-1: 29faa1ef4102c7eecb9a0c1d0d7ddde91132dbb4 SHA-256: 655e31b16ac55c1ab478f835e683b985d9b691f8325880ed90d388d63a8d3429
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 0.9971

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/431946152/hack-roblox-players-game-hack PDF link annotation
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-youthnow_GM406889139.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_off00004a3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3E 24596 bytes
SHA-256: d4e7e4b165641d8d7e49579835eb52638620b96f5c270bd12c818ba46c0b305a
font_01_sfnt_off0000826b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826B 18516 bytes
SHA-256: 90bd1aee5c470a37d92cc59b0941c0b496151a5f4b07a4ca4aaf8cbf88ee13c9

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