Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1175e54a219eeef…

MALICIOUS

PDF

75.2 KB Created: 2021-09-02 01:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ee212d07b9d9d1c4ee4120a1aa999408 SHA-1: 1b184b1c88d84672850b729449e5aa61880f663d SHA-256: c1175e54a219eeefd534e27168b39da193725a27c630685de49276a7678f37dc
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external resources, some of which are hosted on compromised WordPress upload directories. This suggests an attempt to lure users to potentially malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dalton-english.com/userfiles/file/dimuzomukilujipaxililibod.pdf In PDF document text
    • http://954move.com/clients/4890/File/62270166549.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/rugofamojirimixes.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/30194127054.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2af934f9af---45062824401.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/96797909331.pdfIn PDF document text
    • https://congchung7.com/upload/file/pureratabetonuna.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/2dc7c1bb9b34d315fc5e3b30140da11a/61068206916.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/74405843514.pdfIn PDF document text
    • http://mesterek.net/tmp/52395165967.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/7264424710.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b4b57a914---73061481650.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/divatevidafizusufenu.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a612f42ef10---bewipewipaxugagazarefoj.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/88778160172.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609def530228e---wolasemakomefefazigud.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160894664b06e6---92982608321.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c852f25eed5---puzosunifezinarobexotejij.pdfIn PDF document text
    • http://fructusartis.com/i/File/xogefix.pdfIn PDF document text
    • http://anindecor.pl/files/file/kopixekimorareliz.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/lojunejima.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/22592094882.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/koketaxixeb.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/74017863053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=word+formation+exercises+with+answersPDF 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_off0000c3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A9 10876 bytes
SHA-256: 6429ab1a8ef2bbe992370f59a4e118e99d13c2ab197acfbab3397f7bd796f2ed
font_01_sfnt_off0000dcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 15928 bytes
SHA-256: aa7d6c4eef9902320335265876c8ea49802a0b75ec2a8f16dd28afef2f83089b

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