Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37e8583c6e1d354…

MALICIOUS

PDF

41.1 KB Created: 2021-05-19 03:40:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 51dd8e79ca788f74cc9e5aadef6c7d5f SHA-1: e64e78f8a98b3200b12bf1856c576dcb1b531c8b SHA-256: a37e8583c6e1d354f30fa227158ed903abfc918e6b711dca3ac93279742192e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising a "free generator / game hack". The presence of multiple links to similar lures suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a social engineering attack designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/835599320/tiktok-free-bot-game-hack In PDF document text
    • http://ipdrs.org/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://launchpad.net/free-tiktok-fansIn 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_003_off000046a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A0 25164 bytes
SHA-256: ec2d95ecf498ac43e51f9c0b0418ee3bb94c3b673b9a830219259747c7cfa99b
font_01_sfnt_off0000800c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800C 17672 bytes
SHA-256: 6466e148864f63260abd80a5667c662fc9f08880533ecf248a157eccbbaa6ded

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