Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e65c485d8ac55c…

MALICIOUS

PDF

87.0 KB Created: 2021-06-30 02:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 1739288c486ea5c6e3626721926632ae SHA-1: e86f187c07ed132a6ad2b70751f48f745cf6dc90 SHA-256: d8e65c485d8ac55cb526093d9eab415045f94200442a963f2c0356e583e17f04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload directories and potentially malicious URLs. The presence of numerous external URIs and compromised CMS upload links suggests a phishing or scamming operation designed to lead users to harmful content.

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://nomylo.ru/uplcv?utm_term=chafing+along+panty+line PDF link annotation
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b78b1d8d27---38540288057.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/58157134859.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706cf7a2332---fisizebivejojixurojuv.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/11270693988.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/xujud.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a704ae9c868---sikusiwit.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/97f07c690c80b2f138dd6221afcc0b3d/3698297268.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/cc0ebca03265287d33a7db1167d9b3c0/fogujazozezo.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/55a492895bf60b5d1ff3a46a33abd692/47434263733.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/h3bre8bophcb16pevg6hkag98j/kesatimarivelefama.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/60495062314.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/8967a6ba92bfce80cc2ae1b0e264a6e5/4367543714.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070df4bee150---34009314941.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1662c1909e---detituwolosirurakebogez.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/65ad19c6fe00ccaa041777bc3b2b496c/34118101214.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/98063247122.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/xidojexigagonumevurud.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608667fd89c0e---17757265445.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/51236591136.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2413a35ca46380f1fb6b2693cfd3919d/tivunepazutujiwenukek.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ae70aa3bc---57410963751.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/zupexigididewemuva.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/705eba0f6add930408ccc5032840081d/dobozuwijifaliw.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/zazozefenoxu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 17404 bytes
SHA-256: 48dc0beda2c03f55c3190a8ce5287bebb6e3d061cf97b4f23cf8fe58033e0225
font_01_sfnt_off00011efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13715 10512 bytes
SHA-256: f534def56d55f00b4e3dbd8520fe8eeb92f4a093eeefe57270a9333350f75235

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