Malicious PDF — malware analysis report

Static analysis result for SHA-256 e860699f50b4ef94…

MALICIOUS

PDF

88.0 KB Created: 2021-06-30 06:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 529448b063e97cb1ccdba0f79ceac8b4 SHA-1: 735704f574681c9c29600e7fcf00cd13c9258cfc SHA-256: e860699f50b4ef94abb2f892e6a6d310f80950868f37f40446b25c8ca1e73a71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=what+are+central+universities
    • https://cristalensi.com/public/File/50803785383.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7afb83b324---raniram.pdf
    • https://theelementrama9.com/userfiles/files/gakavojiwa.pdf
    • http://russia-ex.com/loruxotuvin.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/49244677692.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a8f559c78---mokitevenuxutob.pdf
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/73917760293.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/73c030e5a1f0787750634cc85a68aceb/10762523052.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b80f25843fdc5cdd262ad5d48cc0eb85/xovinetefiwixob.pdf
    • https://lionkingbali.com/uploads/file/bixamovapen.pdf
    • https://mobilieroccasion.fr/uploads/file/xolopujojavivepane.pdf
    • http://chnli.tw/CKEdit/upload/files/savibomugudejoxepuzog.pdf
    • https://anjingliar.com/contents//files/71761311040.pdf
    • http://thevelascofamily.com/clients/11614/File/fuzedasawagepimegigapiro.pdf
    • http://colegiosantarosa.com/uploads/imagem/file/23266452454.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11ecbe49af---legafudid.pdf
    • http://aci-immobilier-douai.fr/userfiles/files/88032083284.pdf
    • https://dm288.rs/slicice/file/56403665167.pdf
    • http://sugarfree-gelato.com/upload/file/28577078172.pdf
    • https://amoslodge10.org/ckfinder/userfiles/files/6819039661.pdf
    • http://aqbnb.com/uploadfile/file/kesafu.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/9393d99f53667f25787efba9f60528d1/boludefigonuxakuk.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a338d3f6ee---57335609532.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/2uksdqlhm0dohje43ekma04ug0/pudijavuborukeda.pdf
    • http://obrienbuilders.com/userfiles/file/gelorukupenuj.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_off0000f7d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16792 bytes
font_01_sfnt_off00010fec.bin
f3cd7f2f550993998d40993bbad90750f64cf50476f43cf5f0f2df7f079e7556
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 10364 bytes
font_02_sfnt_off00012748.bin
92818c4f8fc0eacadafc762aefbb55bafd31008d2b98ba5f015d7d126f0eb93f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12748 16616 bytes