Malicious PDF — malware analysis report

Static analysis result for SHA-256 060f5d9a102a8ff0…

MALICIOUS

PDF

88.7 KB Created: 2021-08-13 20:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6685a173b1ce9e7af010184708cc3589 SHA-1: 7981359e3dcc27ea6652f2bf562efd731d9d33f7 SHA-256: 060f5d9a102a8ff00d55de0ae2b44710672d312920588b74111bd7a63a187b15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=how+to+make+attendance+sheet PDF link annotation
    • http://altinay-law.com/images/file/52742177801.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f6f6c2c48---fajupibavifigakijowo.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5mjv2g268a31ivblstnjhqbp74/40349659448.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/55031062231.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d21750de8---fenipamojufozizoxuranok.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/14371817673.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/66809667928.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/sezitomasavojelefixaguku.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/51312018375.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607022dff03f6---28004602992.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6b31120071170dba9ff6284a47a714f0/xikagirokowevikikamonob.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/24943292618.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/3849894505.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/nd1lthloec7gr80cd50g59dhb1/negorobokovewizasuzo.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/a15cb7f9c75d12dc21946cb0b6d8f45c/funipew.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dee1b7ad7---17099875697.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/517dqnqstp1d7k9au8ord8b9i7/78092190311.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/nufokepega.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e17fa236f9---42527664953.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/26265210059.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/gapifadofo.pdfIn PDF document text
    • http://kisito.com/userfiles/file/gonotukapot.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/zitedusemekevoji.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/vopog.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_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 19460 bytes
SHA-256: 0393ce23e7057ad1be4f80df75e1ad6a8e9822773a58aaeefee648f5a9dfa341
font_01_sfnt_off0001258b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258B 10564 bytes
SHA-256: f576eedfbbdb14aa8c786e37d789064cba01c6ebbe93185717aac470bbd57d46
font_02_sfnt_off00013d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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