Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82f7f15602edc27…

MALICIOUS

PDF

103.1 KB Created: 2021-09-07 17:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ae2b7ba87464640ca3a00bb9b0092e06 SHA-1: 4ed3f6da1874d9db60fee9b3cc559ae01fd34a3e SHA-256: e82f7f15602edc27187ee5082fa38eef804e6047ff53df99130600ed81826155
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, which are likely used to host or redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware delivery. No scripts were extracted, but the link farm structure suggests an attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b14fdcf30---95158792128.pdf In PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160aafb7c06884---wibefapamat.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/62822742077.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/gijeged.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/labukotogije.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/lixulaparogobop.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/79117719888.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/88141205361.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2f620224709387ba5a387478f3d76412/15086508426.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/mesativotovubap.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3pdv7p6pf3ei8tc721dn5d3eil/13569052867.pdfIn PDF document text
    • http://htwy.com/upload/file/2661409139.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/bawilikaxujavudidatati.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071595431b17---woxerewata.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210825201545.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/77226932339.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/vagujitabosedokofami.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/292496e78e9c36c69f43f83c6b099344/fizajedemomarilera.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/nosikuzuverakis.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f58f7021526---22818347358.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/20126202665.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092ed8b59506---1582713848.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/m4f4tgihqonncrbt0lsg20hf00/wemawabuzaxemedutologavo.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608083da379c9---wumifova.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/5387840556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=personality+worksheet+psychologyPDF 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_off000129c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C1 19540 bytes
SHA-256: 0b7d2f591a509f1128e0389c124cde2c016d254decf47d02176e96dce73782c9
font_01_sfnt_off00015d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D30 10944 bytes
SHA-256: e6d350e8bd2bbc3ba7c4a1d1f866cf0f23f0e58e25bc38d67425ec2b06e8bb6c
font_02_sfnt_off000176a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1