Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d567f08cb34dd67…

MALICIOUS

PDF

73.8 KB Created: 2021-09-02 09:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fcb54bb5c76705e0c50abc88caf8a8d0 SHA-1: e16f1f5dd92cbd678cee51ac6859b9fed08b972e SHA-256: 3d567f08cb34dd678f8a93eab55f88e731374c12b3957f823ab4b0782d76a22c
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on disposable infrastructure or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The file's structure and embedded links suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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 http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/jenowinaneda.pdf In PDF document text
    • http://princeton1959.com/clients/863834/File/loxusomifusujokobulesas.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/52266648050.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/7951991223.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/vabemolozinojevapukavule.pdfIn PDF document text
    • http://sjhtractor.com/d/files/mubivoruwafukosigegaguw.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffcb383ede---53476648885.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/rombuls8is3sr5q3lute5lh7hh/nakekovazibovipegudimeno.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/filomatibaf.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085a0635613a---61894700251.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebfe688239---29023886126.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/b143fbbe0255aa0970aa7660122f333d/puragajujojo.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/binove.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/f4cclovfoeijj6dns26hi8a15m/moluvoxanejejifunudaduwu.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fe56163c3d5---wezarufazow.pdfIn PDF document text
    • https://petala.gr/userfiles/file/rubizobusivozuxotabukumu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985b0a07dce---rukozegegeroxenududebake.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/safoferemewenuluv.pdfIn PDF document text
    • https://flying-vikings.net/UserFiles/file/37392951046.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/qhgadgpvhntuliceuc24qjrrut/7266817668.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ee41c38de---10462460747.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722b541b936---nitefuziwipuk.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/zejikunuberitalogare.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/97482d98948bfa1ded9ea66756ff02d4/mewurikifivovan.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/lisufemuzakepanizexumalox.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/jasejavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=sentence+with+word+onePDF 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_off0000c137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC137 10252 bytes
SHA-256: acd344dc028447b688c1c770d059b23592a568da4b902e6847f14da56126ce51
font_01_sfnt_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 16228 bytes
SHA-256: 78eb9ab3329904e2015117a3bbe7eec842e2cb61e028af7a7b80c79c3c6b4735