Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0034aeac29befe9…

MALICIOUS

PDF

71.0 KB Created: 2021-09-28 09:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e5f323c9801246b52e4be00ccab7dadd SHA-1: 0cca51135dbde0a52a38dfa354ab3fc73a3f860a SHA-256: e0034aeac29befe9c8deeda1d46147959256d5049de76884608c6a28c0f229bc
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://orangcar.com/app/webroot/upload/files/420171971.pdf In PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149a98d02419---peximukobumumivejosenu.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f373b35cf0---xunaratepa.pdfIn PDF document text
    • https://loonbedrijfschimmel.nl/userfiles/files/gerofoxovobafupimuxoku.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/16701183442.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/27862903343.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/43374990135.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/22584678604.pdfIn PDF document text
    • http://onelove.cz/file/13234689279.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/27035975065.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161307997046b3---pepagazulasa.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210905143433.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/kimisi.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/9548650140.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bedila.pdfIn PDF document text
    • https://villadelauca.com/userfiles/file/jejejulari.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/1281592677613ded09537b9.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144908273808---mixajuworaxikalanu.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/56932377461.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/monilubonaminonopabano.pdfIn PDF document text
    • http://stylekd.ru/files/8094325457.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/zepajubixonesobunatonakak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=streaming+anime+my+hero+academiaPDF 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_off0000aec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC2 10792 bytes
SHA-256: 288c546a15913b5be242163f4b6d4aa5d536bd6e890088874ceddb29761d3afc
font_01_sfnt_off0000c743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC743 18200 bytes
SHA-256: 293faa16374a20674797dff022d1b688a8052f8ee774ffb4ec139ad9b2b07ab5
font_02_sfnt_off0000f5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1