Malicious PDF — malware analysis report

Static analysis result for SHA-256 edee696e589e2c7e…

MALICIOUS

PDF

73.0 KB Created: 2021-09-04 23:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e300c8219833c40ad7d23b67e5d24f5f SHA-1: d3c2bbf32c2439634af90586e0fab7fe25b4b579 SHA-256: edee696e589e2c7e1f081c51690d9eb408de99649d5e201d29e5f8b7078ec5b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://nomylo.ru/uplcv?utm_term=weider+pro+4300+manual PDF link annotation
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4c6fc677a---muxazepeza.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/kuzigirurekezalofi.pdfIn PDF document text
    • http://fittbike.hu/files/file/muzuj.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16085b1926c27f---dunipukubif.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/10675309110.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c3675cd66---sirurivarigerukabojeka.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/69699372067.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/mafinaweg.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0702ff14d71fd797f331228847afced6/29099674147.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/kopuzibazakote.pdfIn PDF document text
    • http://yuhongzg.com/d/files/21970118743.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd35a9d2854---2792401042.pdfIn PDF document text
    • http://ux-school.ru/files/files/mazodanegavizido.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/37790254284.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/424435030.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/samuparewimopizan.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/kagaxumeketorafu.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/2713153325.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/3d76ad9fdb26fc80ce2835b5e930005c/23271819788.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/29214432304.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607815d9911dc---sijaxajonagiko.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/0a71b835edb1143fb4ee7960ca2dbb10/rateg.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/nurezujopijajebo.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/10972791413.pdfIn PDF document text
    • 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_off0000b627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB627 10752 bytes
SHA-256: 6a752a7197baea7ee39fd414e3fe12695a0799cfd8bdf233e9e17f72c3e24739
font_01_sfnt_off0000cecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECD 18268 bytes
SHA-256: 66163a2004e4033ea2546b4aecc65644fd863a3faaf463307b84fb0e103e3aeb
font_02_sfnt_off0000fd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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