Malicious PDF — malware analysis report

Static analysis result for SHA-256 1833548a0086b562…

MALICIOUS

PDF

47.2 KB Created: 2021-06-02 18:50:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2fcdd43caa6dcfaf6e7308556cd1ff91 SHA-1: a99d78aba9775334c1e20dd5c0295cd2feeb7a99 SHA-256: 1833548a0086b5623beaf35536fc32425fce80fcfabcfa80a010563480169fc7
240 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free items. The presence of a fake CAPTCHA heuristic suggests an attempt to trick users into further interaction, likely to harvest credentials or download additional payloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/roblox-free-clothes-cheat-game-hack In PDF document text
    • http://ordineingsa.it/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/tiktok-free-advertising_GM835599320.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://ordineingsa.it/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://ordineingsa.it/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/give-me-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004cc8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CC8 25684 bytes
SHA-256: 3e596bc9f4febd680bc699fd21ebf18a5a2c22f6cc5dd8e821b1d188d5fa4cc0
font_01_sfnt_off000087e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E7 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000094f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F8 18448 bytes
SHA-256: 4e020935f753f57f90b716981ecf992b865a7d61337564c875979b976dc37e49

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