Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1b331232c574c3…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 13:12:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f30f4d50eed0da29a0c9a69972a1a4ad SHA-1: 43c144a8e010e772fa52c3f4fed56b4035582b51 SHA-256: 3b1b331232c574c394e670398f9836598c0613eaae5d06253ae734added09e2b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link disguised as a game hack generator, which redirects to a malicious URL. This lure is designed to trick users into clicking the link, likely leading to malware download or further compromise. The ML classifier also strongly indicated maliciousness.

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-112-hacked-client-game-hack PDF link annotation
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-roblox-undertale_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-roblox-robux-sites-that-have-no-human-verifacations_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/comment-hacker-des-personnes-pour-avoir-des-robux-sur-roblox_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-vehicle-simulator-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-get-free-money-on-jailbreak-roblox-2021_GM431946152.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_off00003136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3136 22276 bytes
SHA-256: b6c848da35f8273c3637fcade47978f788004990bee01c67184fc5d8f45c2416
font_01_sfnt_off00006295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 18504 bytes
SHA-256: 1c6239c4e7240bb93b61e959f2b21d4e00e02324577494d7f11381c67a244304

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