Malicious PDF — malware analysis report

Static analysis result for SHA-256 5498855a6695c89a…

MALICIOUS

PDF

46.2 KB Created: 2021-06-11 07:34:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7adf88d6af1d27fcf81480ee6d2fac65 SHA-1: 5f04cc75b0c4b206db70e9bbd5d214f74173c882 SHA-256: 5498855a6695c89af6b016587392c22cffd773ad732bd2598ac170cab5f0dca9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a "call-to-action" phrase, strongly suggesting a phishing or scam attempt. The ML classifier and PDF SEO link farm heuristic indicate a high likelihood of malicious intent, with the document likely serving as a lure to external malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/roblox-free-dominus-promo-code-2021-game-hack PDF link annotation
    • http://bit-sky.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/hack-card-roblox_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/bank-tycoon-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-hack-in-games-roblox_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000508b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x508B 28496 bytes
SHA-256: ef3ed06ea99e7a33f3267dc36048abd7e1d4b8d70bc77c4b8ed9960cd0bd57b8
font_01_sfnt_off00008f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F20 19368 bytes
SHA-256: 5864ec8aa041fa2fb675a9c185ed71a70b5528c2dfaf660ee80d452394e3d16a

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