Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ec02c2e36fa14e…

MALICIOUS

PDF

90.1 KB Created: 2021-08-23 16:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cad73c18606ac1e8093111391914d943 SHA-1: f5f41ae2725fc5ec9b0606ad1f827e127921d901 SHA-256: c1ec02c2e36fa14e8d33a1c656881dbdddc42812dcd91da328811dafe1ccc774
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

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://allytemp.ru/uplcv?utm_term=cross+domain+canonical+tag PDF link annotation
    • http://babamoleskine.com/files/file/fenuvoxopexoguzobimajal.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/28480692072.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ud14h27ar3gbaf1cpkejn1lvl0/5817847600.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/48459863122.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/53019231684fc47c91b4c65be8eef83e/kativubatujoderakelaga.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/rasepizatixelubofukewut.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/20331898616.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/57t6fst6urdmm69iev9m620178/kovoxigexajujatovigod.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609454e3536de---rikoged.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/nanadosowubuzat.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/jawenuralekapebino.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/gigunej.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/16222173469.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/t1e83vciepjf9gbg7cbutti3c6/88216889420.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/sawotirekitoma.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/sr781h1eibi33t5qk83bh1m854/pedinifuwepelob.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/71669999018.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/5389649806.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/7qquojc9vu5p4to3jagqpj9408/suzes.pdfIn PDF document text
    • https://wecareprogram.org/images/file/7577275542.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/8640388106.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d0614a00112---60335560905.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/50689878794.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_off0000fc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 10612 bytes
SHA-256: 6914066d8b9df2df9820683b9127d2b9f354c8b314236d6af87024708fb63b98
font_01_sfnt_off00011403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 17888 bytes
SHA-256: 08a570ce464168272e1b9d3d36dbe98cfae5cf33bff7efdd531432c8df2db76c
font_02_sfnt_off000142ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1