Malicious PDF — malware analysis report

Static analysis result for SHA-256 963de71ed159ecda…

MALICIOUS

PDF

89.8 KB Created: 2021-09-02 21:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cfea6fb84d335b4f93f4316b3182e4f6 SHA-1: 62f33142daec519feb5e50e94fe145456176deb9 SHA-256: 963de71ed159ecdac198134c2ee3ba9f806df3b14f412d37f4b05e68a4e0d1ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce2cfad53f---rufopaz.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d03f7d7b0---jebukimukukazabapixe.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/2943bu5t6hihpvamnrhv35bra7/jipefumu.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/fidemubanejiz.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095f1b70636a---57321463152.pdfIn PDF document text
    • http://schokobrunnen.com/idata/sukafefezagazonuwaja.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/26561008713.pdfIn PDF document text
    • https://codecs.roimages/file/79435524131.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/e6on92b5ece6aii8u0ckqi9f02/40417130032.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/85266577024.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/movifawafemajuzope.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/632869bfdbeadf86826d92a3c58ff597/84180445236.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/6eb567d76d964641dc8931c750ca092b/suwijatimazo.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/34727902179.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/difufubud.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/9078954336.pdfIn PDF document text
    • http://cecev.com/stockages/files/zagologagijub.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/81697109237.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae98b4c4ec---25375269275.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/3757ca58d69fd51fa9acdcf1f893230f/givevasafel.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/64714509959.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/75053688773.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202162814351857.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-30/20210530214743434120.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/5577801333.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=tabela+brasileir%C3%A3o+2019+serie+a+completa+pdfPDF 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_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 20744 bytes
SHA-256: d0d93bc8eae2e982a685be7654f6f554d1416cb33c574226e353c8725b5c79e1
font_01_sfnt_off00012474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8B 11508 bytes
SHA-256: 6707d80865221bf542e379a0dec5ed8d0d63fc77ea3e4b3f110fc594d402ed24

Open this report in the interactive analyzer, or submit your own file for analysis.