Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafd14526992fede…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 14:53:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9dee414f566ad13401905c1933ef9d3a SHA-1: 80f8db8e5d05f37c1dd4ff7065452d3c081cf12e SHA-256: cafd14526992fede2278ad8ab2801081de32d492c4ceaf79c4975c3f28f9c433
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/free-roblox-website-game-hack PDF link annotation
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-get-free-robux-without-installing-any-apps_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/mad-city-roblox-hack-saison-4_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-roblox-without-download_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-robux-no-offers-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/roblox-how-to-get-passes-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-robux-no-hack-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
font_00_sfnt_off00003061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3061 22216 bytes
SHA-256: ebfd2e4992cd7d5a3663ca8bbaef657c436db9bf6fce1d662c2b81eb4bb2378d
font_01_sfnt_off0000620c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620C 19072 bytes
SHA-256: f0d59f1b4b35e580c3840cb277f851b856516c1cfd4bb27d28d5a2db6d497b93

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