Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6a189a7baa27e1…

MALICIOUS

PDF

87.6 KB Created: 2021-08-04 15:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0404d7b574d49b3ddde08a5b53b15d8a SHA-1: 32de8c3c324684b4dee8545ab5bff5278220aeeb SHA-256: db6a189a7baa27e10b4edc7f93ae6c479f34cf516e4e78eed6ed2c3eda63b243
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple links on disposable hosting and compromised CMS upload storage reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://drafthe.ru/uplcv?utm_term=kathi+mela+kathi+song+download+in+isaimini
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/5i2iasth385ugn4ubnempdlo45/92979601438.pdf
    • https://qualitymattressfactory.com/admin/userfiles/file/49147620630.pdf
    • https://nomaquito-travel.com/editor-images/69785952629.pdf
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/70226996842.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/da15803a82b9ac4d514c4f42d7e153ac/lujaxemo.pdf
    • https://dascalita.ro/app/webroot/files/userfiles/files/zipuviwejifitutufukeme.pdf
    • http://lab4050.com/upload/editor/file/lifutodasufoxexi.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/e6b91c6980da728514576dd492119565/rolinexufozugawezi.pdf
    • https://infiniteprospects.com/FCKeditor/file/dewajajadabibore.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/lbamj6jts64onodsp3d1o95i6h/36495610997.pdf
    • https://alirezamirmohammadi.com/images/upload/files/5483384781.pdf
    • https://mancomunidadvaldizarbe.com/userfiles/files/fikaminukizesas.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160822ef72ca9f---69456871268.pdf
    • https://nslogisticservice.com/userfiles/files/94174233672.pdf
    • http://olympicwroclaw.pl/zdjecia/fck/file/gusegeposunelazida.pdf
    • https://aldurra.ly/images-editeur/img/file/lanofonu.pdf
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/bipewikoraj.pdf
    • http://hopkinshigh1988.com/clients/75739/File/jokoniteriwiresimor.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/da7d16d2ffd0e3bba2b0fd917a5d4ac4/54719858810.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c7fa34f57---20551727439.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607814d78358b---29768130472.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/c6go7n0vt8gcqjmk86lsc3f355/79715999770.pdf
    • http://imhkayseri.com/resimler/files/41681145039.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f314.bin
b30c67fc4d92c4d9cd50ff112bf67953601d09cf78701b3309afa0c1b4fb6d13
pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 10764 bytes
font_01_sfnt_off00010b82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B82 16792 bytes
font_02_sfnt_off00012394.bin
b6bd4d00e467c014fcc12971deab74aaf4c7c03184cb60c6bcffc873c9865172
pdf-font-stream PDF embedded font (sfnt) at offset 0x12394 16808 bytes