Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5dd51ceaf6f092…

MALICIOUS

PDF

33.9 KB Created: 2021-07-19 17:50:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 22b60fde63b446cfe6e97c3568beaa32 SHA-1: 2c1e0068b38e040ee99b26ae794a656158b98f91 SHA-256: 5c5dd51ceaf6f092a34099bf70a8f4da10364601c9eb1fb9a8a50ebef1d66faa
180 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game hacks and currency to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The ML classifier strongly indicates maliciousness, and the presence of multiple redirector links reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/479516143/free-minecraft-hosting-game-hack In PDF document text
    • https://magistrinfo.ru/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/how-to-get-free-robux-hack_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_off00002c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C01 25080 bytes
SHA-256: e720e49540a7a2c8512e203b12f4c0cccbadd1d2ce8a815a648fce202be7a07d
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 17996 bytes
SHA-256: bf6ae4c6721fa3eadf2b386a9cfec38fcd2e671f0767c49619a657aa344fd652

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