Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b7988b943c6839…

MALICIOUS

PDF

45.9 KB Created: 2021-06-01 02:07:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 81d183b4a0ca0b0b4a671cec50326872 SHA-1: 251c3f5e0116463ef0bbc6d087b86d33da76b44f SHA-256: 01b7988b943c6839736ae95707a4d842bbca8a2c472aa44724d5f2e81f4ecb20
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also includes a link to a known malicious redirector, suggesting it's part of a phishing or scam campaign. The document's content and embedded URLs indicate an attempt to deliver a second-stage payload or redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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
  • 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-how-to-change-your-name-with-cheat-engine-game-hack In PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/robux-hack-aug-8-2021_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/descaragr-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/roblox-anime-cross-characters-hack_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/stigma-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://holycrossintercollege.com/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000556e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x556E 24296 bytes
SHA-256: 2c395a6c47ef2b7db9bf6f25f357b2cea9e9ed1cbcd23ca6b5c03de5333a92fa
font_01_sfnt_off00008d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 19616 bytes
SHA-256: 1c6154d60bc00248394ebf8dda7fe54757672bf921a173a1134896bb4ac70c7d

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