Malicious PDF — malware analysis report

Static analysis result for SHA-256 26711c064cf57f02…

MALICIOUS

PDF

83.8 KB Created: 2021-08-22 00:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e2981cea8e0c0604f47f54b0eadfe70a SHA-1: 5ae0a1ce4d6c205ec0d997dbb4c9068ed973d66c SHA-256: 26711c064cf57f0295b4e7bfa3380603e68cc69f2f8d065b89ee25746c2fccd1
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://assytekservizi.com/userfiles/files/82652950718.pdf In PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210630_6A4478321CA10B78.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1bb146b03---90671179734.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/22688966950.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1e9fd524275a14cbf5996467f0a510d0/1958255219.pdfIn PDF document text
    • https://carlojans.com/cms/file/34503056354.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/1avl6l9his7r0rsvv0jbp7u6mf/sapivubusilexewu.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/2463354184.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/makonipemarakum.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d20811b411d0ab6761b7633aae13711f/fepubin.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/fesaxuxafede.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/84256202038.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/dakewiwamikopezapij.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b67285da3ce---rijugupunupusimanitavajax.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/14f0dcce4bd7b44d757a63b36aeed5c0/devolasifatufosakapurube.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/fbd906e93accfc63cd0fd1b67d45567d/dupuxosuxozoba.pdfIn PDF document text
    • https://lesura.net/userfiles/file/61320128518.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5e69b8fc5---3774017967.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f520e7ee03b---3443934390.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/84052868216.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210702010640_weotmz.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607de1072ec30---vexenowewe.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/a5d94703267e231d5d6c6df51d4a0c5c/lekujulume.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/pivat.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/08-03-19-58-24-80.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ejercicios+resueltos+de+estad%C3%ADstica+tabla+de+frecuencias+pdfPDF 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_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 17128 bytes
SHA-256: c41a2761d19ec9e9f972b30532cf87f3f36b31a7e572530624165fd4d1157d7d
font_02_sfnt_off0001238c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238C 11028 bytes
SHA-256: 805ab0a78f36ee6f01897380c7f1ced917b389bb87ecaefd040e8f55e947c249