Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af9d1bc5c2471d7…

MALICIOUS

PDF

49.3 KB Created: 2021-05-19 17:49:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7327f665726f5baeac939a1835afc8d6 SHA-1: c7c7fa377541061bff92b3c591f34923d871d26c SHA-256: 7af9d1bc5c2471d77bdaca8b3f349c02c4dfc7462e71ca506eab500a05bda805
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games. The primary link directs to a URL associated with a game hack lure, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/431946152/easy-how-to-get-free-robux-game-hack In PDF document text
    • https://ezgolfer.com.tw/image/data/files/pubg-uc-or-codashop_GM1330123889.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/robux-generator_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-daily-free-spins_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD9 28336 bytes
SHA-256: 0d22df6217d7a5990e722779099d36dd6f6b8aff49b3fb2168bee62ba7543a1b
font_01_sfnt_off00009161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9161 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF5 18688 bytes
SHA-256: c2d85703cc6a1447500036b33f7ea43eb33cd1174df43eac9260fbff62206025

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