Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3362019e6ec2090…

MALICIOUS

PDF

36.0 KB Created: 2021-05-20 15:22:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 86d4f1da187f90b70db718c8f56a2130 SHA-1: aa887c155a643f2375bb47dea35e9275532426de SHA-256: c3362019e6ec2090ab29a904243e52418974c9a4bb0f484ba17b845a8e706868
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to a redirector hosted at netcdn.xyz, disguised as a "free Robux generator" and impersonating Amazon. This lure is designed to trick users into clicking the malicious link, which is a common tactic for credential phishing or delivering further malware. No scripts were extracted, but the embedded URLs and the document body strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.
  • 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-that-actually-works-game-hack.
  • 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-that-actually-works-game-hack In PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-apk-35-18_GM406889139.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
stream_002_off00003157.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3157 24196 bytes
SHA-256: b0cfc841ed0a15d950d819b5116185951ac951dd1720580ce2c38445db5ec705
font_01_sfnt_off000068ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 19136 bytes
SHA-256: e9e8736bed1826902485352f20294e96b644ee357cd6186db79dc9b33c578c67