Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ea5cde32ff5c89…

MALICIOUS

PDF

85.0 KB Created: 2021-08-15 01:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6551e624d9e87f214dab915fbc446dd6 SHA-1: e177b862ffc5724c5b0999b857c6a3e8aa7c5940 SHA-256: 26ea5cde32ff5c89b0f2705ece9ed947a8bdbb946085ada59bbb443065aaf598
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious destinations. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=attestation+pole+emploi+vierge+remplissable+2020 PDF link annotation
    • http://fine-cottage.ru/userfiles/file/wabivovuguwenejubojamasa.pdfIn PDF document text
    • http://zgic.ru/!upload/files/91172251938.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/25235613930.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7a75033de2b4b10fe9c15a64ce6d4ada/gesomuxi.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c766f77b077a38886d0512ccf291bb97/65622998097.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/wisuvupos.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf09af23d0---16429895062.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/tulejowibupinivuzu.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/80056534485.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/tumerakobawarapu.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/16136367454.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/5bt4atjmjjurcco91rgeq3074a/zeredokuruvotiro.pdfIn PDF document text
    • http://apothepharma.com/upload/files/12491789216.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/97709324924.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/566ad0c8467c4b5270779a212ec5791b/97456089528.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d45adda6451---biwod.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/33a4711bf0a1d81150e4aa5833175802/zubidaguripovoxoxaxifibep.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/32415524853.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85878e4f4---devinojugolijamoretinega.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/53811facffc0f787ff02a9b6f11427f5/wozalidinuwa.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/paxemupuxevu.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/89995951898.pdfIn PDF document text
    • http://pi-consulting.ch/download/24879138785.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_off0000e665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE665 17796 bytes
SHA-256: 80f55e150d0123e0cec0bb59b070706132ebe56164c67f96b959126bed1ee7b6
font_01_sfnt_off00011358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6F 11024 bytes
SHA-256: 43f43c87e0c00ba63ece2aef9680642c56b84890496cf41178d7e81d3830b2a2

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