Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa853b6df06a605…

MALICIOUS

PDF

44.2 KB Created: 2021-06-02 16:33:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e48e403a8c8fd1ee8b3c2efb3da15739 SHA-1: dcb8d4d86026a06f38828741252e4402f15aafb6 SHA-256: 5fa853b6df06a6057c25e98c891bf70351ec9e86d6684491a545f8f5fd29dc5a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The document body and heuristics indicate a clear intent to trick users into visiting these malicious URLs, likely as part of a phishing or scam campaign. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

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.xyz/app/431946152/real-no-hummon-verification-robux-hack-game-hack In PDF document text
    • https://uofk.edu/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/pubg-uc-daraz-bd_GM1330123889.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/generator-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-com_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004da5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DA5 25492 bytes
SHA-256: eaacd94753a94c3172db38cc1959acaee013c76697c2c070383867dfefeb4870
font_01_sfnt_off0000884b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884B 18940 bytes
SHA-256: d05c7aea047dc7b7de15c09dae576e7be2725617e9b7042a88a4624f79d3a9c6

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