Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfbfd3449496555…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 22:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fde6697d2a07d27661ded00bf8c395ce SHA-1: d57661a2b177c687be8ac72abbc3c3c092129e0d SHA-256: edfbfd34494965551d0fac5f43f3ac84e4582a0858f704990ede76e516eb0631
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 0.9551

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/479516143/free-games-like-minecraft-game-hack PDF link annotation
    • http://krymtorg-r.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/oprewards-login_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/cheapest-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://krymtorg-r.ru/images/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://krymtorg-r.ru/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://krymtorg-r.ru/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA8 25984 bytes
SHA-256: cb9128b2a7181409db18ecb2334e22a5f5cfbf0844a3fce1f3c8c02fd57c54c4
font_01_sfnt_off000085a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00008f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F47 17996 bytes
SHA-256: 6316af01e653c53aa8313e9ee065e63d320a9dd1c98e4ac08eccbec55cd1c79a

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