Malicious PDF — malware analysis report

Static analysis result for SHA-256 6954083d6697737d…

MALICIOUS

PDF

75.3 KB Created: 2021-09-04 21:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 94efe0cd4a86a39f604e8c3b02419257 SHA-1: 2c4a3def4986f30db12ae3f650a026f7c7fd44e3 SHA-256: 6954083d6697737dc706dd34bb5db6ca6c99e362882496eeea5ed3091dbe8d3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern involves directing users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=mfh-5-1%2F8+festo+pdf PDF link annotation
    • https://biocoils.com/img/file/jezij.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/59527053009.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/renuxetitatowevosemirawo.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077c72937a1f---roxiw.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/pu82kfpnaujul9kem3d7tcbfdq/tukavokisibub.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607019781be92---virid.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/34655619809.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210702_213807.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/57662540956.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/86289494667.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/sojow.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/bulunib.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160e8cff98b3de---togom.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/90482388693.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/matosiwojelit.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/kowenufumodimenixurese.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/3u886dg42nr0iu5udo6pqif525/xanigesugiwaxizupip.pdfIn PDF document text
    • http://belean.pl/userfiles/file/lewewetap.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/94a06d2681d54ce191c255609d6e4aef/75412510891.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/caputctbg480bactu7hkfcece1/12090364473.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/4te80lpoevgsj1s043p2fl06tb/83182790609.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/d6gkam85spda3l0srs0odod1o5/22737155540.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/30914667354.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de00f76086---99997547518.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_off0000c13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13D 10548 bytes
SHA-256: f13bfa058d64dc46daa513781fcd56345ae26be2e9bb1567c1230cf2537fe655
font_01_sfnt_off0000d999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD999 18024 bytes
SHA-256: b4a539c6412d006d1d53fefd36cdb575fe95b9f6b108916761bf714d34cd03c9
font_02_sfnt_off000107ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1