Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8a46bb288e996a…

MALICIOUS

PDF

49.1 KB Created: 2021-05-11 02:06:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f44a1ccf4b31305069dd016ec5fb177d SHA-1: 58443bf30fb68f2c52ebb6fc4e6bed8ac41fd83a SHA-256: 1b8a46bb288e996a2a2d8dfec89b581c12ff59527fefa645ffe9394eb8838e61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free exploits for Roblox' and 'game hacks'. The document body and embedded link actions confirm the intent to redirect users to these malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector lure, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/431946152/free-exploits-for-roblox-game-hack In PDF document text
    • http://www.fvsspa.com/images/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://www.fvsspa.com/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004807.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4807 25704 bytes
SHA-256: e49c15476231376ccd4600a27ac7b0446e1a7375a939e899237a104752cdf591
font_01_sfnt_off00008381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8381 4028 bytes
SHA-256: 0d4d44d30016b99bbc90c753c732b6df86a0d151363155bd21fe8034512cc79d
font_02_sfnt_off00009138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9138 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off00009d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2B 18348 bytes
SHA-256: 3eb1125b3232d06dc8927376afe50af41f8c0a9e23720a9da0c3984e77695e12

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