Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd5d7cf1363d9b7…

MALICIOUS

PDF

69.3 KB Created: 2021-09-19 20:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fc35cc29314f9c5c5158747edafd5d9b SHA-1: 8817206e2d4e58a39b745c12849fa266bb857fb2 SHA-256: 2cd5d7cf1363d9b7e3880fb19300c5d1e87643a13472a12784bf447d0b01e304
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious files. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were directly extracted, the structure and heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/5d5ccb8b4dc6822d51afe0fd8267eb8b/lavupujetewo.pdf In PDF document text
    • https://mm-podium.ro/userfiles/file/80582551917.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/15890146322.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133d8e5db1eb---tudipilozodunulitokavu.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ef6393479---pukefadut.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/68747317464.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161352a9832326---kamamuvemuvowogejenakapur.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/69153965271.pdfIn PDF document text
    • http://aweibel.com/Photo/file/89366691427.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7de552931---54521280980.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/32068739556.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/pizedijadusesupun.pdfIn PDF document text
    • https://agrando.cz/files/file/12821810298.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/taxakozozov.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/11638475791.pdfIn PDF document text
    • https://partnermind.cz/images/files/23686890732.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/dad44ac0489574653b3c27e7d9bb3fd4/piwuluwogedolusexonom.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/zewumulogoves.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/worufunululiguwotat.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210908102600.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/zolilagikofufelomepa.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/tetujoseseg.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/71942553066.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/19980983746.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/67355007177.pdfIn PDF document text
    • http://agrihitech.net/media/ftp/file/35318940081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=detective+pikachu+movie+download+for+androidPDF 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_off0000b236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB236 14164 bytes
SHA-256: 50bf4935281304e7ea94d2066c6cdaab1c9dfbf6406f3dbced8b91db064135f9
font_01_sfnt_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 11060 bytes
SHA-256: 8a96302e793eed03c7d4187a1481b322272c108b8f53ba0980a573173ad93d0a
font_02_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1