Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20c97ca26b47916…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 03:28:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d52a2b479fc2840bc082db606a2e2b9f SHA-1: 7b3ef85684963b7ab1b74029e19bb54705c245cb SHA-256: e20c97ca26b47916f3eb503f78dc68642019899aede1e9a60e4bfa5e65e92816
180 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, masquerading as 'free generators' or 'game hacks' for popular online games. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to lure users to malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a high likelihood of exploiting PDF vulnerabilities or redirecting users to a malicious site that may host further exploits or phishing content.

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) 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.tw/app/431946152/free-robux-with-no-verification-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/cheat-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-animations-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/100-free-robux-daily_GM431946152.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_off000030ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EE 22524 bytes
SHA-256: fc38a5a57a21eb7d0dbc3c1ccdb8416eef6a3b629f9cab9d2029e086df78d9b0
font_01_sfnt_off00006351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6351 19436 bytes
SHA-256: 152779ac3709d5a43144f85cc286cfc78713a2961a87782e1bc06cce99e4fdaa

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