Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1f99ac6aaffae7…

MALICIOUS

PDF

36.7 KB Created: 2021-07-06 13:50:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7f0207f67d4757524aac47da07257242 SHA-1: d19666ea193e1fe48cdfde12e58a30ce1a0e6f95 SHA-256: 7e1f99ac6aaffae729170dfe45bf66199670ad569c8530a7b0016c075a3b83ed
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.tw/app/406889139/coin-master-free-spins-hack-2021-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-tops_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-mad-city-hacks-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/tiktok-free-quality_GM835599320.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-russian-clothes-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/impact-hack-roblox-hp_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-accounts-on-roblox-2021-october_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-robux-hack-2021_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_002_off00003401.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3401 24280 bytes
SHA-256: 0655adb4046ea7a4457a84dadc5db1e35d5a8a3697ab0a83a9a7c2af21952a3d
font_01_sfnt_off00006ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA6 18748 bytes
SHA-256: 4f32b14f246b44eaba0400620f01c91865c601ae222e2b66ea15b73a2cdec045

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