Malicious PDF — malware analysis report

Static analysis result for SHA-256 267baf8e64a225a4…

MALICIOUS

PDF

38.2 KB Created: 2021-07-06 10:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4d82076291e88016f4fde745b293ea65 SHA-1: 209cb6305017d504f6622ef317d52aae38bfa726 SHA-256: 267baf8e64a225a4d367c461b7096c92a230ad7b5959f9b86acc189b483d0f53
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is http://netcdn.tw/app/406889139/master-free-spin-and-coin-links-html-m-1-game-hack, which leads to further malicious PDFs. The document's content and structure strongly indicate a phishing or scam attempt designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/master-free-spin-and-coin-links-html-m-1-game-hack In PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-injector-hack-2021-synapse_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/hack-client_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/completely-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/dominus-rex-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/can-i-hack-pubg-mobile-uc_GM1330123889.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-robux-javascript_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/como-atravesar-paredes-en-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F1 23296 bytes
SHA-256: a38acce17514a60cc0888990b7480fb0064f72f50b6598d8fe0bea6db85f05b1
font_01_sfnt_off000066be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BE 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off000070a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A3 18956 bytes
SHA-256: 85e071f9d2d9aba7decae53ba293d7c98952cf6adb5dc147492857e3bbfc39de

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