Malicious PDF — malware analysis report

Static analysis result for SHA-256 294f33f6ff5f1954…

MALICIOUS

PDF

78.8 KB Created: 2021-09-22 10:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5d28f551d0b5e39b94bd38c11a3299a7 SHA-1: ab480dc8d44eac17a71f778169ddad77fe399f5a SHA-256: 294f33f6ff5f195424a92d00a7705071ef883d5b74f66cc3a2f6a4f4cf1a0d68
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to compromised CMS uploads and disposable hosting. These links are likely used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://yournew.site/wp-content/plugins/super-forms/uploads/php/files/t2e2afa277o5adsra6hejh3ssm/89647509542.pdf In PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/50ce345cb534eaab3727ccc6a2b0e975/gerivojakana.pdfIn PDF document text
    • http://bndweb.nl/upload/files/90022882197.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/83899774796.pdfIn PDF document text
    • http://simoncaulkin.com/images/54125002722.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/pulesedidifamubuli.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/39099784702.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/38479773933.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/dizewazimuparagoba.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/mutuninetosifokojura.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/56540506422.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614699d97cdd6---4662011226.pdfIn PDF document text
    • https://pincodehub.in/userfiles/file/volojaxala.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/75890310430.pdfIn PDF document text
    • http://tai-group.com/upload/files/marinopiletoru.pdfIn PDF document text
    • http://yuli-china.ru/d/files/galeritewisiwufomopolebal.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae2c8bc772---90362272583.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/76146063317.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/8358738226.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/sadarapiwiborurewemalu.pdfIn PDF document text
    • http://cmtsport.com/pliki/25714823070.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/kijuzefenog.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/f3bd64ccccd9b5299ff07a269c16795d/xodofezojas.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/tuxidudutumatemodir.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/92702407146.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=anna+deavere+smith+twilight+los+angeles+1992+pdfPDF 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_off0000cc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9C 11416 bytes
SHA-256: efc9c92be149b0e164b50a4afd29d76b6d4319fe81a9faff735056e96851823f
font_01_sfnt_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 17672 bytes
SHA-256: e21c0e013f9c1ebf15220a4acd91e66eeb1cb262b17505214938da34af1180a0