Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f3efef5af8d189…

MALICIOUS

PDF

42.8 KB Created: 2021-05-19 06:12:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a9f345bd3ca3dba906cb63a572000085 SHA-1: d57e54523e6649428b44b3491c007e975b3a1eae SHA-256: 76f3efef5af8d189a2f79ee7c947d733baf7e955d68572a6f40090dab39f1719
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users to click on links. The primary link directs to a malicious redirector infrastructure that hosts further malicious PDF files, indicating a multi-stage download and redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure tactics.

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/master-coin-hack-app-game-hack In PDF document text
    • http://yioipzafeiri.gr/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/robux-premium_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/tiktok-free-song_GM835599320.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://yioipzafeiri.gr/images/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B60 25320 bytes
SHA-256: 88181a81ce30a4cce586d7e3d933bcea6848ec4991ebb7d0a76394f5e4dcc04a
font_01_sfnt_off00008625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 17892 bytes
SHA-256: 41282dcb1c000e988ea8b2199b00347d54e117e16c55148ab4165d720f01bc1d

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