Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf247d1f6876a31…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 12:35:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c8c3f84557d78a19578ae192d130fdc6 SHA-1: a8d81cbedb25f0276c81ce89e8721419c3f53045 SHA-256: 8bf247d1f6876a31261e4094e1a9d1a5f16cfce353556a4690e10ea4d7351578
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains references to 'free generator' and 'game hack' lures, reinforcing the malicious intent. The embedded URL is identified as a known malicious redirector, likely serving as a first stage to deliver further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spin-coin-master-link-today-game-hack In PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/flubhack-roblox_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A2 25356 bytes
SHA-256: e8eb666aa3494fab3e28f0ada160e611eaeb0f6f51453099564e87c8381cbf31
font_01_sfnt_off00008c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0B 18412 bytes
SHA-256: b350531339c9517a18660b7b0575dfec4269b2a4083a2d9381830f178b2ed085

Open this report in the interactive analyzer, or submit your own file for analysis.