Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0fb69208164209…

MALICIOUS

PDF

77.2 KB Created: 2021-09-03 20:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 440cfc63fba5d42b1cc054bec1068850 SHA-1: 486907810af3991ca623750b6c9f231ef821b126 SHA-256: 0d0fb692081642097d1eded89774695082d30f0bc48ba139ea9e83b9e8efdbaf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous external URIs pointing to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://garglob.ru/uplcv?utm_term=engineering+design+and+graphics+with+solidworks+2018+pdf PDF link annotation
    • http://bogelaipigeon.com/upload/file/tifuwujarosu.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/bafotuxogutud.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/3b30d61eb3fa92535c4c7a3592fc56f7/zawiwanumisewisig.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210731043130.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/mexetilibud.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/vatufebegapufidupiwaw.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/657b289166b0894d70252a975488e401/50638756706.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210830171039.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2ca792bb0---jafoz.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/jebigamugesopatozogog.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b7bddd5e2---jerixo.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210507051829.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/12aa5994d8a27303437f7f9df1d1959d/30557886250.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae92cdae166---614719624.pdfIn PDF document text
    • https://anup.bo/images/files/zifodeduwa.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/vuxowitix.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1913b81ad4beb0d3ebb4427cb6de28c6/deganebolik.pdfIn PDF document text
    • http://calhi1977.com/clients/879053/File/wudakaxu.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/fomovirogapu.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/57505203056.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/bubobo.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/kozisupusobuf.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_off0000c82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82C 16712 bytes
SHA-256: 3bf987ff9309849d807ed719489d6933aa75e9d78d4bb36e7ae7056af5fbee3c
font_01_sfnt_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 11564 bytes
SHA-256: 8017b52c24cecc67f030b29ab828741fe697a00600b990480deb16bb171bb5cc
font_02_sfnt_off00010ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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