Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e3cc76df08575e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-21 04:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f3eea2b3c89710575a6ecd7e3c3467a4 SHA-1: dc82f0c7155eb6d2c8ca1b3b4835b697e13452c4 SHA-256: 32e3cc76df08575efdfdfc2506baa6bb98d272915d3e091ad5d19f48b3bfb656
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 a link farm, with many embedded URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=redmi+note+10+pro+5g+vs+poco+x3+pro PDF link annotation
    • https://holycrosshealthcare.com/userfiles/files/jarefilolerat.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/tcauai51vgcegv03li5kkj4jc6/89921258160.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/30696334803.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/woseguwuzod.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/772de41ded1cfc045a52769793bfaa71/1354852893.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/tapiforobipemexatirazat.pdfIn PDF document text
    • http://gabortech.com/admin/file/jebavipagerimelagenerejuv.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/94786545682.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d758616f5c---vojalebekogofojawaba.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/91291948828.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/zonizetajunewekufanug.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138d22c6b834---volewumexeler.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140049c8cde9---mokuremuretibed.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/65664142867.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210913193034.pdfIn PDF document text
    • https://langumeistras.lt/i/File/74278104029.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/26870088737.pdfIn PDF document text
    • http://simonide.org/userfiles/file/32205167580.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/gibavoretufinavirojese.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161406f5aa8e70---sugumad.pdfIn PDF document text
    • http://protok.pro/upload/files/67239459255.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130228c6eda4---92520844966.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/xiruxivazuvafawolajole.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/46330642643.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_off0000d17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 18496 bytes
SHA-256: cd6ce3443eefe1ef9479ea07631410934d5e0bd598243b19abb10f5a58576838
font_02_sfnt_off00011a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6E 11340 bytes
SHA-256: 44058cb133886df23f39df87719f3c77c8177d9aea1e7dddb483b08a432e0d70

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