Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2f40cc29ed5db0…

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 09:20:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c294943af3efe74cbf7bd9b2fc1d031c SHA-1: d37ae3839978d4af64c57f0e35a00c9eab4b780d SHA-256: 1a2f40cc29ed5db0dd6b8b8dc9f04ca89f5807a900d09125f3867469d5c65395
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.co/app/431946152/roblox-shark-bite-teeth-hack-game-hack PDF link annotation
    • https://bookswithapast.com/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/rbx-dream-free-robux_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/how-to-hack-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-robux-hourly-giveaway_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/roblox-how-to-get-free-robux-without-bc_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/roblox-servers-that-give-free-robux-march-2021_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/broken-bones-iv-hack-roblox_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-robux-daily-rewards_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/shirt-ash-on-roblox-free-on-shirt-free_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/promo-codes-for-free-stuff-2021-roblox_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/roblox-robux-hack-2021-working_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3108 21952 bytes
SHA-256: 97fba56ab7a1aa9af3bc2fe36bd752fe96c2568fd93b5510446c4dd09c5ced5a
font_01_sfnt_off00006157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6157 19044 bytes
SHA-256: c7ca7677d133ebb8bd02e1320a70c16a0a14b561f76acd4969c8cd46d6ef1c23

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