Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b700b5263864999…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 22:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aa142874d1b46975aba5d828fc297db6 SHA-1: 5a06be0d7d6595a530c8e1471fd0c393d94d2465 SHA-256: 2b700b526386499925c20895c87e9cd02f4a97c230dc1b857c9f87fd1bc9b130
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and hosts further malicious PDFs, masquerading as game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates a clear intent to lead the user to harmful content. No scripts were extracted, but the document's structure and embedded URLs are sufficient to infer a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 http://netcdn.co/app/431946152/roblox-hack-lumber-tycoon-2-script-inserter-game-hack In PDF document text
    • http://ipdrs.org/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/create-roblox-account-free_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-website_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/spin-link_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-cheat-speed_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/get-free-followers-on-tiktok_GM835599320.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
font_00_sfnt_off00002f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F85 22636 bytes
SHA-256: 75360290dfa82249895b88f0eb7ae165fadba18e60b773881f401dbc2df58b32
font_01_sfnt_off000061ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CE 19576 bytes
SHA-256: 90fa89ceb1810e4319f51718bcd533192c9489fb743d02755c5adb32b5a3a21b