Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c82cb3a6ffd43e…

MALICIOUS

PDF

44.2 KB Created: 2021-05-15 10:47:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 86428dad89bc5a3a93007bd5cc78199a SHA-1: 74ddb43f657c1d8e0a33457dc2f9d94c6a30acfc SHA-256: 71c82cb3a6ffd43eb6d3a5477b5d8d2699d13ce62af332d60158e957991acd75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free robux'. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-hack-no-verification-2021-game-hack, which is associated with a lure for game-related cheats. The document body, though partially corrupted, contains similar keywords and URLs, reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/coin-master-hack-no-verification-2021-game-hack In PDF document text
    • http://www.peterdejonge.nl/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/com-roblox_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_003_off0000476e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476E 25412 bytes
SHA-256: 12a5dd2307725b3da411772d189941a453d854ae081986526dfbadee0c2f0b96
font_01_sfnt_off00007fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD4 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off000089ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FF 18252 bytes
SHA-256: 180d563c5e2d4e96f25bdfb7de4de3bd7d6a0696216fbddae55f211609535b0c

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