Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f123285cae0d67a…

MALICIOUS

PDF

32.9 KB Created: 2021-07-04 12:02:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fbb9e5d48abbe07aaf6ae55d3c004433 SHA-1: ff38bca639f049ce96f2ac9a4ab9a4bc89eaa6b5 SHA-256: 7f123285cae0d67a4d42180f3f96ff6dbe240bd9369b344511c7f400b5416c8b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them by promising game hacks and free currency. The primary link redirects to known malicious infrastructure, and the document body itself contains obfuscated text and URLs related to these lures. The presence of multiple SEO-optimized PDF links suggests an attempt to distribute malicious content through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/freecoins-game-hack In PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/play-games-online-free-roblox_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-console_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/wall-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/are-free-robux-games-real_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/how-to-get-free-robux-live-stream_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/lumber-tycoon-2-glitch-to-get-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/roblox-royale-high-how-to-get-free-diamonds-2021_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-without-verification-2021_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
stream_002_off00002e8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E8A 22028 bytes
SHA-256: ce0e6fdeacfe71972054e1c5c058d49e2109c513490a71e279b4a1d7d1f8fe3b
font_01_sfnt_off00005f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0A 17896 bytes
SHA-256: 95b27e0fe0f8d09f21308dfe7f1e0da3cbc5e6d7e802a0f52430e90404511a42

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