Malicious PDF — malware analysis report

Static analysis result for SHA-256 8303962531a29f41…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 04:34:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2cd7a7c65829f944740602e54841ab68 SHA-1: 0c15a5bce31ac9b2bf354b472cc5bf928b61925d SHA-256: 8303962531a29f41c383d5fdc63a9fac35f5449157a1f730edd07cb6c7e5bdc8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free spins generator. The primary link, http://netcdn.tw/app/406889139/how-to-get-100-free-spins-on-coin-master-game-hack, is hosted on known malicious redirector infrastructure. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites, likely for further exploitation or malware delivery.

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/how-to-get-100-free-spins-on-coin-master-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-god-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-world-pw-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/necklace-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-is-gay_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-free-robux-page_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/como-hacer-hacker-en-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-in-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-cheat-in-apocalypse-rising-in-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/get-free-robux-by-number_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/heroes-online-hack-2021-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-welcome-to-farmville-vip-links_GM431946152.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
font_00_sfnt_off0000334a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334A 22732 bytes
SHA-256: 14333025656693da1125875e6287b0f5cfc85e237dafbad5cf3320ba5e6cfb38
font_01_sfnt_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 18616 bytes
SHA-256: 75e6ca0d846814030aeb8d238a6779e7a1e1c8622c374b69a8320c66161e23d2

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