Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4134acd50d0e1d…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 08:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6074d358ed6a8c6b9079dcc0ba3a0b59 SHA-1: 6a8c6068ccc3861f2a572330c24b10613e7edd30 SHA-256: 7f4134acd50d0e1dd9b09551857d8858f07758665e7c5d6af82187d7c4b56de8
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 currency' to lure users. The primary redirector URL is http://netcdn.tw/app/406889139/games-like-coin-master-game-hack, which likely leads to a further malicious download or phishing page. No scripts were extracted, but the document's structure and embedded links strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/games-like-coin-master-game-hack In PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/deadly-sins-online-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/pants-roblox-free_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/hack-roblox-vehicle-simulator-2021_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-promote-your-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/things-that-are-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-premium-roblox_GM431946152.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
font_00_sfnt_off0000342c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342C 22992 bytes
SHA-256: c0c00ba8764a5adea32f58564c7d2e44b9d663379f2ab1cd9686f9521a130fac
font_01_sfnt_off000067a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A5 18264 bytes
SHA-256: 7d1498385015156658f2c4797ed1f9ef5355b2a3c7c805ee34a2c4c44564bfa8

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