Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13d4bf80aa2ec61…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 02:12:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1b511ffacb31ba74d6ec3624cc9ea699 SHA-1: 6f576124cad4b0da123f217c1341249db5d8f157 SHA-256: a13d4bf80aa2ec6112f9bbe9aa5b13ac07cc637fd9149ef1cf23cb5a5608976f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a site offering 'free game hacks' and 'generators', a common lure for malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple links to similar lure sites reinforces this assessment. No scripts were extracted, but the document's primary function appears to be directing users to potentially malicious download sites.

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.tw/app/479516143/minecraft-java-edition-free-download-game-hack PDF link annotation
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/roblox-booga-booga-spee-hack_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/nija-legend-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3kediri.sch.id/__statics/gudangsoal/files/what-are-points-for-in-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_off0000346a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346A 22384 bytes
SHA-256: 82125c3a83bcd89c4e4f2afd1b536a0d5b6d4dd978c8f0ef9aab2840789ed434
font_01_sfnt_off000065e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E8 18856 bytes
SHA-256: 8fbddb6c46886cca0158565b48b603f499ba597020719e0d36747ec5902bb2a9

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