Malicious PDF — malware analysis report

Static analysis result for SHA-256 db129730f79a2647…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 21:39:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 971e326b5a37264f292cd53e0b9aaf94 SHA-1: 74dd2e3a26eaabdbb4a917697812f07e26a1cd7c SHA-256: db129730f79a26479bef0c275d9c3f821264728cc5c8a450f17f19e32b25818a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and sites offering free in-game currency or hacks, such as 'free robux' and 'coin master free spin'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms these links point to known malicious infrastructure. The document body and embedded URLs strongly suggest a lure for users seeking game exploits, likely leading to further malicious content or downloads.

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.co/app/431946152/pg-family-friendly-roblox-content-free-robux-2021-builders-club-game-hack In PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-free-download-for-android-tablet_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/minecraft_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-2021000-robux-for-free-only-one-click_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/pokemon-go-free-egg-incubator_GM1094591345.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-make-your-t-shirt-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/robux-com-free-robux_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_off000030be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BE 21500 bytes
SHA-256: 931bee1a504501f9554e008fe39adece33f6f8b022151e9c5c556d4f5c1ada21
font_01_sfnt_off00005fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 20184 bytes
SHA-256: ab43574da3e23bdc93dd018fc4736ef4665f35c059cf2acfe5cc01f3babb6b82

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