Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b149f185a1065d0…

MALICIOUS

PDF

38.4 KB Created: 2021-06-27 21:09:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 07759b739f678846f516d2e4d4c8ec79 SHA-1: e63908321812a30e35cc93b39db8f970fcd8b9e7 SHA-256: 2b149f185a1065d0105895d6c61a03abab1e51b27e7a5eae8b7c69866f044238
180 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links that lead to websites offering 'game hacks' and 'free stuff', identified as malicious redirectors. The document body and heuristics strongly suggest a lure to trick users into visiting these sites, which likely serve as a front for phishing or malware distribution. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/how-to-get-free-stuff-in-roblox-2021-september-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cheats-to-type-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacker-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-on-ipad-or-phone_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-flood-escape-2-map-test-infinite-air-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-often-pubg-uc-flare-up_GM1330123889.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-hack-micah-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-phantom-forces-hack-reddit_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-lebansay-group_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-robux-windows-10_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-use-hacks-on-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B98 22928 bytes
SHA-256: cb64d80889608b81d10962475f317583f23c74b708fdf839f4ceeb713035c3f4
font_01_sfnt_off00006ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED9 19896 bytes
SHA-256: 3a0b775af5cf6d3ecb29c4aa658c4f6027b930f5c4cc647cfd1492efcc733017

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