Malicious PDF — malware analysis report

Static analysis result for SHA-256 effe608bf64a82ee…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 21:09:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e1a59db31be83d14e0bf89e3e69cb938 SHA-1: 4e4ece1287132b10422e5dae3ec6f067aa0dbf7b SHA-256: effe608bf64a82ee123a5b45814628a432aa5e3263dcebb803423dbce89cd2f6
160 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-villages-game-hack In PDF document text
    • http://fred.com.ua/images/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://fred.com.ua/images/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://fred.com.ua/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/roblox-hax_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_003_off00004a67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A67 24460 bytes
SHA-256: f8c1fe159d42ac174fa580dcf21ffacf7ecc3e600979c471ee65c81581b9c9ae
font_01_sfnt_off000081b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B3 18044 bytes
SHA-256: a8028c0297769aa7dba6e0a54b0a1dc6e5838f70d2f821663f5d8e8c2692d7c8

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