Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f71078f371783c6…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 01:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6bbffd7bd2aa66d7005f2a052feba547 SHA-1: 7ba12740e268a426250e9088b14d7b213ec86a7f SHA-256: 2f71078f371783c6b01838b2a490148ba978692cc998595bdb08784d2e16ee1b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' to lure victims. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow. The document body and embedded URLs suggest a social engineering tactic to drive users to potentially harmful content.

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/406889139/coin-master-free-spins--game-hack In PDF document text
    • http://erptrends.com/images/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://erptrends.com/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/robux-boost_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/xray-mod-minecraft-114_GM479516143.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_003_off000049ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AB 24800 bytes
SHA-256: 304af3bcf0e8754ffc03e0cbbc33db3e27fd743870de103eb459ceec00ea36b1
font_01_sfnt_off000082e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E9 19212 bytes
SHA-256: ea2ccea76d1f571611d10c4b01070d88fcd3b5b7afd5bc625fc8c7f39c81b3f3

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