Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac09612754e44cd…

MALICIOUS

PDF

85.6 KB Created: 2021-06-25 13:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1d97f63b2e8a85bbae9d9ec1adde86f0 SHA-1: b42a18c5264e7dbaa8dde166d54442c43c04a32d SHA-256: eac09612754e44cd00507926cf5e3ff0dc64dddb231e1a44481172e191b3f885
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised WordPress sites and other disposable hosting, indicating a phishing or malware distribution attempt. The file's structure suggests it acts as a link farm to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.neosynapses.com/wp-content/plugins/super-forms/uploads/php/files/t7u6v93sichl3retqta5lltajp/vozojexejo.pdf In PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c01a3b79ea2b87f93718066e0c52826d/84710080333.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/37593933961.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/kumaporo.pdfIn PDF document text
    • https://carlojans.com/cms/file/naxanigepudosemekad.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160accd610a6f3---63073312795.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/91d17e4fa457603a494fede8d7fec167/48825829352.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1559a839b---levagutokabujubidevufe.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/puwerofer.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2e13f3b2c---75659448777.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/xerapiduzelogojakud.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ls3tgqt2clr6dvnhpgjb8cfhe2/75576802327.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/60113382228.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/bgohbt0ofi8q1jcnj0hoot4ml0/wakenojuvo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7ab115b8911e1f1b304da0b082234e2f/41422755586.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/luwisudolimifamixej.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160819b1382838---mavogesan.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/wovajositarupozoxovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=titration+of+h2o2+with+kmno4PDF 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_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 18016 bytes
SHA-256: 5b8e416f857eb4c7ed1e1169f56d1c0a8dfcd9cef38a708238c7df6464644122
font_01_sfnt_off00011a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001322b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322B 10472 bytes
SHA-256: 081ea94329d017664b64203038fd6bc7b6a7d907343da6033c2ea4f5f72a3d83