Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cacadf43ba575b…

MALICIOUS

PDF

41.8 KB Created: 2021-05-21 00:05:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 893e696ca6cacfb9cd87f9a0e381f7e4 SHA-1: 69f330599da41b3eb5a524bc7291c18497f8233b SHA-256: f6cacadf43ba575b94459e5ff503279432efadf168077fb631339dcae2d94e4c
200 Risk Score

Malware Insights

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

The PDF contains a malicious link that impersonates the Microsoft brand and redirects to a known malicious domain, likely to trick users into downloading further malware or engaging in credential phishing. The presence of multiple PDF-specific heuristics related to malicious redirects and lures, combined with the ML classifier's high confidence, strongly indicates a phishing and redirection attack. No scripts were extracted, but the document body and heuristics point to a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8120

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-roblox-outfits-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-roblox-outfits-game-hack In PDF document text
    • https://adventureglaciertreks.com/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000346e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346E 27860 bytes
SHA-256: 7cc7e923514b641860fed339a43d0098fdaea0bca45021e7e74d5ec2b72af8de
font_01_sfnt_off00007564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000820b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820B 18312 bytes
SHA-256: 90da43312d6bb992ca5b038b2bc6e2b12c2c9d98bca064d3c60a0cee32c74c59

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