Malicious PDF — malware analysis report

Static analysis result for SHA-256 e492f2b5ccce0c1b…

MALICIOUS

PDF

53.2 KB Created: 2021-06-04 00:01:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0fbc4d0721b79ea39f80af16b56e0e39 SHA-1: e1f860c8832d040eefcc4a4771de72bc91cffdc0 SHA-256: e492f2b5ccce0c1badb4aafc7e568c492033ffb2b02b128b014293a0f235a299
162 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure and an MFA/2FA-themed lure. 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 0.9616

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.online/app/431946152/free-vip-roblox-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/tiktok-free-followers-generator_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://collectrobuxIn 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_004_off0000529e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529E 27644 bytes
SHA-256: a29bc621d69b1f41c2d7bd862e062af929ba93b20567086bbb9f1d91ce0bb820
font_01_sfnt_off00009225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9225 8476 bytes
SHA-256: 84214d0f3c4392c2471fc02812cfe6546628ddae3f752daa1be927e3f22a40db
font_02_sfnt_off0000ad53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD53 18380 bytes
SHA-256: 94d125d3dbde40cc9d5054aafe15a05973ae878bc41c5e9bff003f3b9c84471a

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