Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8a9271e6a0a882…

MALICIOUS

PDF

36.5 KB Created: 2021-05-20 15:57:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c6427626932f76f4c015a4fcc210ead SHA-1: 9526e0a3a55e0a447cb52194c6f16ede47629ec9 SHA-256: 3e8a9271e6a0a8828145d3563de2390be72cd538aa2c551e11b2b85a6912d146
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains multiple links to redirectors that ultimately lead to credential phishing pages, impersonating brands like Walmart and offering fake game hacks. The document body explicitly contains the malicious URL and a call-to-action button, indicating a phishing lure. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing campaign.

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/roblox-printables-free-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/roblox-printables-free-game-hack In PDF document text
    • http://www.bripi.pl/images/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/generator-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
stream_002_off0000340c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x340C 24660 bytes
SHA-256: 4cd2d634362bce55871524181d39d97ae146e468980c8cd49b68c4540371ce20
font_01_sfnt_off00006cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAD 18552 bytes
SHA-256: b5ee65cd5901ad7693dfafde0b4a4a2e01b57e67b0b7341f09a29d5f18e40ca4

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