Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f32af292e19f933…

MALICIOUS

PDF

69.3 KB Created: 2021-09-06 10:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 94e574046a37c81cd3b57c12233c718e SHA-1: db306f5f21c539fc2e529ff50e3401f680518b10 SHA-256: 5f32af292e19f933cfb04c5b38962973a838d6afcc89f536dcf4ac055c26f6ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous compromised websites and disposable domains, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/rrfiuqea7hdqkombkpbonl5fa5/7602548941.pdf In PDF document text
    • https://matrainagycsalados.hu/userfiles/file/nenodezoguzoridile.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/fopabekuvako.pdfIn PDF document text
    • https://actor-conseil.com/files/file/wixezinig.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/wozatagevesurixifijol.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b974ad93b2---25578410205.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/54014659479.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/29883346084.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4c557412e---92127648459.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/dasonumasasopovo.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/34809004423.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/sanalazufusesepewoped.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160912d34473c7---sijuru.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/7161908507.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2181801855---votutamu.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/gizegubokigatorejifidej.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/40240610604.pdfIn PDF document text
    • https://marosme.ro/hirek/file/jivejixofozuw.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9e962560d19a82008fae199e012ec948/5165286480.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/61128055399.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609afb64914bd---vajowobaxujekibadimotumor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=xsara+picasso+user+manualPDF link annotation
    • https://mediaget.com/userfiles/files/luzurijixasik.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_off0000b065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB065 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87C 10544 bytes
SHA-256: 6e3e44811618afd7f085a65519c82cf617896ee843d931e2acfa0614c44d2d20
font_02_sfnt_off0000e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 15276 bytes
SHA-256: de2ab87acaa99615d3e05bc8087347c8e8883d5220a9f040e9be671db12f13f5