Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f96ea32c2cf2f0…

MALICIOUS

PDF

77.7 KB Created: 2021-09-21 09:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 70f4c30ce1526f53492ac699a693e7c3 SHA-1: f4c5244469086672341ebbaee6348baffbbd0d93 SHA-256: 27f96ea32c2cf2f0ee6f45c97dfc09952eca898f3b6bea9abe8d4df8dee2fd69
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS uploads indicates an attempt to host or distribute malicious files or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://smidgel.ru/uplcv?utm_term=rain+man+full+movie+watch+online+with+english+subtitles PDF link annotation
    • https://mcdelandes.ca/uploads/file/72068834779.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gejojetokiwonofomenej.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/8305132773.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/luvopovuwije.pdfIn PDF document text
    • https://campermagazine.tv/public/file/wanujozuxulavifojo.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16142cf6dcece7---72756076027.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/pedugirimexisakipu.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/nevopomibiralogodaj.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/zubekazazogobu.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/d4d6771635e6afa13170c777afdc3f17/dalazulokupajajufumatu.pdfIn PDF document text
    • https://airbays.com/userfiles/file/64067358449.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd5cdb58a7---67775728388.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/rorajexobolozenosobur.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/nigedipimigopiri.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/3k7kuf5sr6663rjocb186476t9/bidowamodilasiti.pdfIn PDF document text
    • https://korankertas.com/contents/files/68523683178.pdfIn PDF document text
    • http://recrute.fr/files/files/vabaxugilesowa.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3bfe1ccd6---81667530518.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/52k2am6d13udcgitv369p3mqj0/rototowonojo.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/55138613196.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/vupiwawumiredokefa.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/16079401675.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8a8169043e8a8a67c7598d84de947137/67042695833.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96C 17588 bytes
SHA-256: 00c7182f5a78b3c7a47935065ea920002053209095cacb42a780ac02f5eae3a6
font_01_sfnt_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8D 11120 bytes
SHA-256: 8c40edf4da0dbbc44056d24424c579b400993d46c6c583cfc2969fd73d438afa

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