Malicious PDF — malware analysis report

Static analysis result for SHA-256 df83157d49cc26e0…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 15:17:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 77b82474046d039caf7099e4ed5a0653 SHA-1: 43029697bb03ddbf6e1d8598f6af09fadf80e9cb SHA-256: df83157d49cc26e035eb4f46316f280b553ee7794cbccfb0499e61820894d741
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free game hacks' and 'robux generators'. The document body and embedded links strongly suggest a lure for users seeking in-game advantages, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of malicious links and the lure itself indicates a high likelihood of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/431946152/how-to-get-free-roblox-premium-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-become-pubg-uc-seller_GM1330123889.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_off00004fb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB7 29736 bytes
SHA-256: e825a54b325dfcc6b2dc91f46adfbf2e4ac14613491079eae770b852c608d722
font_01_sfnt_off000091b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B8 18888 bytes
SHA-256: 3ba61bc9b3b11ac9a9f3633ee28239b24940f03e179bf58c89719787cf1740e7

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