Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3144fcbc5138422…

MALICIOUS

PDF

38.5 KB Created: 2021-05-23 01:41:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41e7fac5df772640e7e42a8bf0c62c0a SHA-1: 93bf07201beda1df7c1f4289aee396b148512dfb SHA-256: f3144fcbc513842215d8372ccffb01449bca64e4bbe70a02f854722e7450ddfd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to known malicious redirectors, disguised as free game hacks or generators. The document body also contains similar lures and a call-to-action phrase. The ML classifier also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • 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.
  • 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/479516143/free-minecraft-server-maker-game-hack In PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-spins-hack_GM406889139.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_off000033be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BE 25104 bytes
SHA-256: b5326d2df0a72572855cbaa91a4cfadb38179c621ff040b04e411e626913cac2
font_01_sfnt_off00006cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00007662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 17852 bytes
SHA-256: a2113846211f941d41962086a33418b46c13efddcea93467eebdb757cad7d920

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