Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36660c9024d0f9a…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 01:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a083037b5aa88729152392c11e4af444 SHA-1: af0fe26770cab3cfcc07e518932497f2ff4af5cf SHA-256: f36660c9024d0f9af3463074c56ffab09d1b53febaedfe21444317cf5afcb634
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The primary lure is 'daily-free-spins-coin-master-app-game-hack' hosted on netcdn.tw. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially malicious sites, likely for further exploitation or credential harvesting.

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/daily-free-spins-coin-master-app-game-hack In PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-diamond-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-do-you-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-pokemon-go-accounts-level-35_GM1094591345.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-jailbreak-noclip-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-jailbreak-hack-download-money_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-gmes-were-their-isa-in-game-money-cheat_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/pokemon-go-free-event_GM1094591345.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-breaking-point-hack-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-org-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/cant-go-to-a-room-in-free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-roblox-cheat-engine-64_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_off0000331d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331D 23176 bytes
SHA-256: 9763efe377edc9d27da1977fc5bd31265caf4fa035bc5a83189a14c6da7e7c30
font_01_sfnt_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 18596 bytes
SHA-256: b14aa08320e077b2d8ee80ae23911225b9b06fa740893d1d250ba0d53672be81

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