Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ee5178974f5c22…

MALICIOUS

PDF

51.1 KB Created: 2021-06-03 16:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 919caee229e071f67cae1d0a225d3b8d SHA-1: 1286cf4c073adc82851f4171b8dd21b1951d1e63 SHA-256: 06ee5178974f5c22a170a71e0570f791291d41ed6ff996e8e178340d792da62f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to a known malicious redirector infrastructure, specifically designed to lure users with promises of game hacks and free currency. The ML classifier strongly indicated maliciousness, and the presence of multiple embedded URLs further supports this. The document likely serves as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.online/app/431946152/oprewards-com-roblox-game-hack In PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/dailyrobux_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_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
stream_004_off000057a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x57A7 34812 bytes
SHA-256: 663920cc497d4eb6d80ae8c8daeff5fb89e538ed723f1d9620ecde904df04d43
font_01_sfnt_off0000a414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA414 18784 bytes
SHA-256: 639e9c6fee21fadec9bbcda4b83e838a121abbfeb61251c021aae19a2229de7e

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