Malicious PDF — malware analysis report

Static analysis result for SHA-256 58665ae4e5342391…

MALICIOUS

PDF

48.2 KB Created: 2021-06-08 14:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 42e1517c2d07037d023a61a91608b3ff SHA-1: 71ba5347e6234e32fe147c0d524ab80bf116cdee SHA-256: 58665ae4e5342391f253703217f6dba4dac19326c6a2d39c849e2b0b373721ba
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to game hacks and free currency, directing users to a known malicious redirector. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to redirect users to potentially malicious websites. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/free-admin-in-any-roblox-game-game-hack In PDF document text
    • http://mountain.mn/uploads/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/can-you-sell-shirts-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://mountain.mn/uploads/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C8 26168 bytes
SHA-256: ff8cb2e2f20651f31d83514f44b30e34a4ead03af4d840ab3b2f90739a31ab3a
font_01_sfnt_off00008e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9805 18912 bytes
SHA-256: 04d3fe78bbe890b3c704564b9525e6c429c693841ae83091168cdde2e235254e

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