Malicious PDF — malware analysis report

Static analysis result for SHA-256 de58db9e02751552…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 13:34:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 13396bbbf36addb6d07e3a7d7e2743a7 SHA-1: fce0d4a8d081ed776bb540199b4505d95533dce6 SHA-256: de58db9e027515528bb13b01fe8c642af09c8488f40149684393bc9bc53e0e0b
180 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The document body, though partially corrupted, contains URLs consistent with these lures. The primary heuristic firings indicate the PDF is designed to redirect users to malicious sites, likely for further exploitation or malware delivery.

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/roblox-pics-game-hack In PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/paypal-to-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-no-vertification-no-survey-no-pasword_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-free-gamepass-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/tool-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-best-hack-for-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/rc7-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/comment-hacker-dans-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-hightspeed-roblox-with-cheat-engine-torso_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/robux-hack-2021-working_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-hair-in-roblox-girl_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_off00002fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD7 22100 bytes
SHA-256: dd192ee4fd8be87e86d20a644da3172968afede80c43c013e3806d097170d70c
font_01_sfnt_off000060cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CD 18760 bytes
SHA-256: 4b095f4b8887294ffd8970da978281d8a745c5c5e0b2658ea64b9d3d0d40b151

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