Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5dd47b41479decb…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 11:32:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d02018d00570e431c778eaf534947ced SHA-1: 940dc37ad347b310962848ad3c1a52888df86ffc SHA-256: a5dd47b41479decb2db54c58e4b132ae8adf25cdc664c11d27850e4c27fbb57d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators for popular games like Coin Master and Roblox. The document body and embedded URLs suggest a lure to trick users into visiting these sites, likely to download further malware or engage in phishing. The ML classifier also strongly indicated maliciousness.

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/coin-master-facebook-page-game-hack In PDF document text
    • https://ourlady-elearning.com/userfiles/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-maps-wwii-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-guns-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-pastebin-raw_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/get-robux-now_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-In 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_off00003071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3071 22088 bytes
SHA-256: dd4f0ed61daffe698c8f989ca6b8750260ab5f8489cb3350bc7cb773f5fe1636
font_01_sfnt_off00006143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 18480 bytes
SHA-256: 5d6d0ede33b127e84b79b509c6ccd09058f3a52601dabf250a6839ec593284cc

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