Malicious PDF — malware analysis report

Static analysis result for SHA-256 edab4fa84ae14c7f…

MALICIOUS

PDF

76.2 KB Created: 2021-09-03 22:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d5fde988223c07103cdcdb32463c016 SHA-1: 7fd28f3a20f8f7a3cfbb4d6a61b9c1b67a5d40c3 SHA-256: edab4fa84ae14c7f858d7ac1f85ce79ce822785ba03c03ede36b269fb7cfcb5c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7151

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://pepinieramontana.ro/ckfinder/userfiles/files/jujuxosoda.pdf
    • http://flamefitnessstudio.com/cewit/images/file/godavemovidufitavekukamag.pdf
    • https://unosms.us/userfiles/file/jebanobelazibomu.pdf
    • https://doublehair.center/upload/ckfinder/files/kovomafitineroxi.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/df4ba44bc4681bcf103bbbdfe7b5b0b7/50802684556.pdf
    • https://armagedonspedycja.pl/files/file/genomolupa.pdf
    • https://kisikana.hr/UserFiles/files/xogigewuwoxewen.pdf
    • https://aspirans.com/files/file/76487915406.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/adc04d3ea634d2cc51a86160e836392d/44689045564.pdf
    • http://maynenkhiinverter.com/media/ftp/file/rujexom.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fd8c8ac7c---xibesesinetux.pdf
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/rewigipuxipojowasiwuruk.pdf
    • http://verynailscm.com/user_img/file/10277267702.pdf
    • http://nicenpos.com/userData/board/file/1155846982.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210813005916.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8f8e5fa2a---72704143309.pdf
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/mejetuwororidoxozezaka.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/nvfh8smmedj753thl7l3ano5m1/15229658574.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd18331eee---59693482987.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2696151da---zewajasuwolowarevilebusaz.pdf
    • http://grimastone.ru/files/92754326671.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/46343289120.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=computer+architecture+quiz+questions+with+answers+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 16792 bytes
font_01_sfnt_off00010267.bin
177efb7e4b9657f65e98f6b2e9c364f5d86107cfa29807f083f3f96e5ce6fbd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 18308 bytes

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