Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f913bb211e16c4…

MALICIOUS

PDF

56.7 KB Created: 2021-05-16 00:51:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 249ff6831133ed29e2bf3667d1dd91b1 SHA-1: c4443ac8df59b544847a6c3cb3bdf35f987706b8 SHA-256: 44f913bb211e16c49707b483bad68b8aa3c8122bd40163e2553d91223644ff42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The primary malicious URL identified is https://netcdn.xyz/app/406889139/daily-coin-master-link-game-hack, which is part of a chain of redirects. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8198

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/406889139/daily-coin-master-link-game-hack In PDF document text
    • https://www.croatia-flyfishing.com/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/get-robux-now_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-hack-client_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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B68 28916 bytes
SHA-256: c74478c8ab8b7103806ce1972791e5f4aac585d512ba034bce0b26ec61e12d10
font_01_sfnt_off00008f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F08 3124 bytes
SHA-256: ff095f415eae424d72b093e5a6fc95b3fc72aab58810e44820efbfead4fab872
font_02_sfnt_off000099f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F8 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ad1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1E 18136 bytes
SHA-256: 982ad4b1f6b69cb91937238f9970daf2e783e2300abd9bcc91da09ddfa737630
font_04_sfnt_off0000cec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC4 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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