Malicious PDF — malware analysis report

Static analysis result for SHA-256 369d0b9b2e6250ee…

MALICIOUS

PDF

72.9 KB Created: 2021-09-07 09:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c2d869cdfccde31f24bac88ba2797f08 SHA-1: c9a23fb8867f63f20fb6187dec2574ef61707452 SHA-256: 369d0b9b2e6250eee5520f755c588ad8151d85d676d3e62f40959d5a063f08ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The primary purpose appears to be redirecting users to potentially malicious external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crysiq.ru/uplcv?utm_term=3+phase+induction+motor+wiring+diagram+pdf PDF link annotation
    • http://dpnovelty.com/upload/files/51255997795.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ab85f795a7b16a53d76f83fe44310961/8107367259.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/31972707792.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/67003857878.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99a74054cf---xoselazaropaserid.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a329a269927---5634542069.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/14906318435.pdfIn PDF document text
    • http://dd-eng.com/files/files/zofidi.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/485157a646f3d4865bf136b8dd9688ac/61502731055.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/26869ad741fa0f5122631c58efa93125/50414860279.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1d150ced9---kavat.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e20fb6e652a---61997153189.pdfIn PDF document text
    • https://atrax.hr/files/51883951933.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/fokafarikes.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/nijekawokimanizoboxu.pdfIn PDF document text
    • https://ecole-anglais.com/upload/files/50176838714.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/41552294648.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/79932416330.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210803194313_0rnvnx.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/gororuzapofedivenuveru.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160945b19eb638---tafizozobikubilaseled.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/46739301128.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffda0bee86---kupetasizodivukevixamada.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/selitebeworewejipake.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_off0000bb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7F 15428 bytes
SHA-256: 36be6c2eed27b5e798341b96478c32fd5c026fdb4b1fca5b15b4ecc2f31a3157
font_01_sfnt_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 11284 bytes
SHA-256: d91fdead32149f8bfff355ed838024d1d9afef83bd7fa9dc7670a026ef7e6156

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