Malicious PDF — malware analysis report

Static analysis result for SHA-256 075066f28bf0835d…

MALICIOUS

PDF

95.5 KB Created: 2021-06-30 19:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0289b5129e968b970d8deedf9ce3ed4a SHA-1: 07ace3849e600118bdf6cbdea9666693cfbc8f9e SHA-256: 075066f28bf0835d397784d061e284d137c8e7dd7caf4ea3493e9ed8846ccee8
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/69729d48e5f6a5c1c5a8d8a025905e1f/1850621186.pdf In PDF document text
    • https://soalmatematik.com/userfiles/file/8014020135.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/87ce909113e2e933f2aff2b03d2efc0e/74492686891.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75a38b0378---ripanezenas.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0c5aca9149cd25d4541a104810687420/20277992285.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881846807c8---nuloxadowebofapigogi.pdfIn PDF document text
    • http://simonide.org/userfiles/file/sufiwebivenikum.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846dbbbd8c1---79787669050.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/15876727699.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9171060e---dexikilametiva.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/9qrvgs225rt0hsp9d2o9e8dppt/17129963173.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/mefelegokezegazifen.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815a7eca00f---13944440902.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/55498805548.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dfa5f0818---68767854109.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbdc9c7f63---xazefug.pdfIn PDF document text
    • https://istanajp2.com/contents//files/zuwulu.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/6ab114901272289e65899ea49a64f769/46624362388.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea2808b724---56808356460.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///kelon.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4070d5754---48710153294.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0f2379d9f---13511174432.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bc48a3267ab3461e02c28df004c58769/81409676950.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9567ebfa4---mogolopururukom.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f43ed8f59---40062081718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=perry+crossing+movie+theaterPDF 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_off000110c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C2 17932 bytes
SHA-256: 37f3203c606ab2c7aec79e8b976598d24c6a4ad1c5cb332b2278084ff92a9bd0
font_01_sfnt_off00013fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA0 10812 bytes
SHA-256: c9ef4d2323b7b5b02d4627e36bb28b52c3acdbbb81646ffceaf054a35883e468
font_02_sfnt_off0001587d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1