Malicious PDF — malware analysis report

Static analysis result for SHA-256 be73f2147e4f54ca…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 20:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f06e3652961d29c3e721ac529c94c31b SHA-1: 6af30c70bf3e0d4b2c712e3321d9759cac2a8f44 SHA-256: be73f2147e4f54cab7eeba2cff7906e6e6f875c214c079bad58b0210d98c3e9e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mi-stores.com/basketballtotaal/images/editor/file/lofax.pdf In PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/775f54a83ed9eace7e8837276345a38a/72967804024.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/zifiginipaserilanonido.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/bikifaden.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/77002508931.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/durikomivifewelag.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/70511663054.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/nuseluvimakerufegekurad.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/92062445348.pdfIn PDF document text
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/fetukoxegafate.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/zisitoni.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/27226417166.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16144581babf99---goxudovituxamarumibu.pdfIn PDF document text
    • http://devveb.net/userfiles/file/92842997493.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4f94c4851---55970900947.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/ruwunudupopedu.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/sifelawaxofenibami.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/rigubapom.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/76530104818.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/dusisibivezedelu.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/gopopipabelupa.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613185115a74e---16560402008.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140535c8d3b9---pamoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=john+wick+3+with+subtitlesPDF 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_off0000d5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D2 18592 bytes
SHA-256: 72211587036bdb4a6134d83b60685605b91190511e6f763b9d956b38665abe28
font_01_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E45 10644 bytes
SHA-256: 806b7a721c55a17a0d060beacc91cfd7d0080b1ead2c5a567be54f412e33ab87

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