Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5bd68725c579d9…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 07:36:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 715926e35c5f61910e83e936d117d156 SHA-1: ff750ba16a6eabc69251bb450cebe7d2867edbfa SHA-256: ce5bd68725c579d900e03092b2dd1efdaa3b3a55fa92ae615d62d6f6dbd26ab5
220 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, masquerading as a 'free Robux generator' and impersonating Facebook. This pattern is consistent with credential phishing and potentially malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick the user into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-legit-game-hack.
  • 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 https://netcdn.xyz/app/431946152/free-robux-legit-game-hack In PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-hack-to-get-robux_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_off000048c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C0 25620 bytes
SHA-256: f5b41d52be920c90e5d7071229423eaa8b75a0560a7dbdcf0f9f7008d56d2e86
font_01_sfnt_off000084f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 18528 bytes
SHA-256: aa02e962ea97e6ca8489eff7fd27dc9c81bb0b76c5ed523337a23ffa677521ed

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