Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3207d52c6db4138…

MALICIOUS

PDF

80.0 KB Created: 2021-08-18 12:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 62f6b0332b54f0328c9634c05bdd932d SHA-1: 1ac6afaf559a82de4aa31d244840cae7a5e170d5 SHA-256: f3207d52c6db41387a0d8e9ec829ca79fd767ef986596f500024f792dcc39427
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://pixomot.ru/uplcv?utm_term=naked+economics+undressing+the+dismal+science PDF link annotation
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f0bf5b0cc---kasutevezerotibobo.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/58406667925.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160df8a70a07f2---58139289997.pdfIn PDF document text
    • https://digireg.org/upload/90368694753.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/fovizil.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/zuvonukafid.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072916ba5561---16624402143.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fe9fe16a2---60379446697.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/5b22721e4db07f4bfb2868ec32af6721/fegedokemilomageliliso.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/62703991599.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160935b5c8ab19---lewarugudeziwesodikif.pdfIn PDF document text
    • http://seedcambodia.org/htdocs/cljr/data/files/15076024195.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/70479803725.pdfIn PDF document text
    • https://sabunwangi.com/contents//files/10292388279.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/51v9jkqqh7t4ffeh7k6p3b1ug8/39178751292.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ad2d52b53f88052c4196365919cdb4bb/5769145305.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/zutabawurivenuje.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/78616678896.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/qsuicgap6umg1i0h84b2i9p9rd/xawipabuja.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdbc16b3b8---46904309866.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a409454d---zefefopo.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/loxinipitar.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/10835172215.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/64849f2f07373515c903c34c8dfda641/95448056404.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/r8108v4eeavn89milli5kukri6/vixefutowiguj.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_off0000d4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D4 10984 bytes
SHA-256: 8aa053d16696d87b1dc7c2c609f223fbb400210dc7b2ed89f50e0df26443dca8
font_01_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 17036 bytes
SHA-256: 1203c2b1aae46954e552f7435a720b3ac29863a430ecf038d51d3a35b9b1f2ce
font_02_sfnt_off00011a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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