Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f30ced1cdaefb2b…

MALICIOUS

PDF

90.0 KB Created: 2021-09-01 14:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d6edef595c3201b0af6e6c2e294fe57 SHA-1: ca24653dc8fd8685447162d323dc98774f84d124 SHA-256: 6f30ced1cdaefb2b2c65302f0dc9292be5764f42ec0840b80bf73fa039c8a36e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links, many pointing to compromised websites or disposable hosting, suggesting it functions as a phishing lure or a distribution point for further malware. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://nomylo.ru/uplcv?utm_term=the+wisdom+notes+of+mike+murdock+pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/3lmtf8t3f312p1v26vjqqool21/87169694620.pdf
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/78898585961.pdf
    • https://airbays.com/userfiles/file/72622616461.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/lnukd3f1vcb3h8rj2korn2gmuf/93307572041.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf9f075b9b---15212531734.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/3195a09465aa2b9a8ce2a2ed444d3bea/duvazakibojefibozefepebi.pdf
    • http://awkontrakt.pl/ckfinder/userfiles/files/26049086849.pdf
    • https://iohrp.org/f_files/files/vezovebetitimorudikag.pdf
    • http://elitvorota.ru/f/file/rogatagi.pdf
    • http://gunjanjain.com/app/webroot/js/uploads/files/ligezokupuvixuzafotisemak.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1e69485fd---19097016494.pdf
    • https://arvikabc.com/images/uploadedimages/file/pedesirudekirogupu.pdf
    • http://ip-golubev.ru/ckfinder/userfiles/files/85085628235.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/ec472096cc033fd7ab8546f0a7dea121/likawewamomosoran.pdf
    • https://webornate.com/viking1/uploads/files/xusasudomotubazez.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de81e78351---55004767962.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/vb3p6ee3cmqcp8vp43ekqqgov0/60785244534.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ldp4a9lq4ch339k29gun0i86pn/61760208349.pdf
    • http://ahkjt.com/upfile/file/ligugabetirob.pdf
    • http://acrclubinversores.com/files/galeria/files/nagufenewedulalotinu.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aed55e631f4---polugegijasibupubak.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608353159bdf7---zagesasapefibawofe.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0f42cf81b626a290b1d32a3eddd5baa/zezifemejowe.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/fl167qkksnkk1rhrgngofvbjqv/xasivuxex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 16792 bytes
font_01_sfnt_off00010ed1.bin
ce7b04ea93bd2b46c0f79bf52e24c11b77e6cb42f26af4035ade373d80102f96
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED1 10916 bytes
font_02_sfnt_off000127ff.bin
800a912b01dec0c239418dd5e90b1c5dd1f03ac0a37eb3fb7bd41976e1b0f136
pdf-font-stream PDF embedded font (sfnt) at offset 0x127FF 19440 bytes