Malicious PDF — malware analysis report

Static analysis result for SHA-256 340dcc9a49d9ba6a…

MALICIOUS

PDF

94.0 KB Created: 2021-07-20 00:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: cc292591d14eeb67f991fd12c2a813e2 SHA-1: a4c13888c60ff8f41259ce3c0779fafa8250e467 SHA-256: 340dcc9a49d9ba6af2a3febcb83bcb904ffe3cf8bd6202624f34e3755678f922
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/df5lhvpb27ojibpmkjlj3cucv2/wurezebasarip.pdf In PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/681275129fff88c4d3c3a71dbb31deb8/mixipuxuvudukoxutelu.pdfIn PDF document text
    • https://ottopianos.nl/files/72293580563.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/c0dc75520007a5e92708ba3656a0d29d/13964997916.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/74041979858.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/35296514941.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/jopuvaxej.pdfIn PDF document text
    • http://hkalc.com/userfiles/35873965136.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c217a19300f1c9b645324a19c2a06d9a/21839716046.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/52036999757.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210714044931.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1608efb7---bafokuzujavikiwit.pdfIn PDF document text
    • http://kmsenior.org/file/files/dukosowakuwajuxekimogat.pdfIn PDF document text
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/49181394102.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d813416391c---nekokekumemor.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/24385277751.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/lafimekamowenefusexufuno.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/dimujasasubibodesizo.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/dc34ce5041e98ec7f6ee5ea379f0bae3/73832242802.pdfIn PDF document text
    • http://proxima-design.cz/files/file/fenoxigulor.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/3d714f7b3a4b61274191e6d1e366ccaf/54618670271.pdfIn PDF document text
    • https://maturana.cl/upload/file/wugifefunusepaz.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/6460656346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=staying+in+a+relationship+out+of+guiltPDF 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_off00010bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 17256 bytes
SHA-256: 531373f9efd8077cd14e224d2acd6522d56987fb7bfa86fab750bcdcf5a213f5
font_02_sfnt_off0001512d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1512D 10928 bytes
SHA-256: ee68d33ee30a39c92357648611c9d9b913b152bde37570f2eb2ba5129501629c

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