Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e78c7547e0d24a1…

MALICIOUS

PDF

77.9 KB Created: 2021-10-16 17:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f14a1e25dd6d988c422bb97e5a9b22ba SHA-1: 882d0757c2fbed799254c9a10e7ff2bbace5e8e8 SHA-256: 0e78c7547e0d24a131a36ac35c40e8df12da384d42e27be51e9de0f486ded277
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific content or intent beyond directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ka-base.no/images_content/file/42319955884.pdf In PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c56d9e5673---79131859811.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/fcl99nge0dvb7j6riogru6mtsd/86529696844.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/siwag.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/vazumisudenesikunizekej.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423f3e30b4e---20947336860.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/18748891207.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/81938423018.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/redigiduximavalaberara.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/vomujosaner.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138be0a7cd84---tapobebemofozuwomoz.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161630f687735e---dujatawalolak.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f43645e55eecfa1b8d263b25307463bd/podepegubimeduza.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/nekiza.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/51737895553.pdfIn PDF document text
    • http://julianina.de/upload/file/rabiwolelujupi.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/92992796964.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/lupelerekugibuwasuro.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/62784121395.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/60593592238.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/afdd2b2a073f4ac079c03d883eb6bf75/11419766729.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/jeleme.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1634075599.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8in8lepipfat2j7fk0700gmoe6/9840618093.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/BGAemAmcdTc/uplcv?utm_term=period+more+than+10+daysPDF link annotation
    • 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_off0000cde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 16948 bytes
SHA-256: a67a15b0cfa45b61ac6b15833016dfe6cdd0277740414575710d0eaaf3409314
font_02_sfnt_off000111a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A3 10756 bytes
SHA-256: 43df5da783ef522313f191fd720693cab0ef258b1ce9fe9542574d502bb8b5f0

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