Malicious PDF — malware analysis report

Static analysis result for SHA-256 374ab3341ecb062b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-05 07:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8f73cd57d830b77d1792de796a519e95 SHA-1: 8afa7a93b072e915d5cea055d980cc17a158c761 SHA-256: 374ab3341ecb062b8d45361e8745ab0e49b0d5449f80c2e5b225e4e0a8500a11
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 as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, distributing numerous URLs that point to potentially compromised websites. The presence of external URIs and link farms on disposable or compromised hosting suggests an attempt to lure users to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://archism.ru/uplcv?utm_term=basic+graphic+design+books+pdf PDF link annotation
    • http://cochu.net/resimler/files/dikamefezomoxebunite.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160f354fc73bbd---1042219120.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/66440868422.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/lrs7vdfdggol0nkc9f2ei570f5/zetitogirowebijozafonu.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/bl7kaomfjoou8qc4ocv26liq61/zuzokikonafiviw.pdfIn PDF document text
    • https://apra.pl/files/file/25559912682.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a76b7130c---fimilunadawepex.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/fudafelujopuv.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/36527314269.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161173e56a9f0a---lubuvomuj.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ef4c935ae---banigotogukesuze.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/95203993289.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f999dd09462774460714ec0b0f79859/89386886997.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/49451080547.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/jagekewas.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/zesapololewiji.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/pajiwatitapizesoboz.pdfIn PDF document text
    • https://mgc.to/sites//web/upload/files/87807158569.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bbb2d6fbc---75373223482.pdfIn PDF document text
    • http://www.moyekolodin.com/files/xobirizabel.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/60802114861.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/p24d71onn86ltv1oc0duu16dp7/27387698453.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/xubupurolepawefubagubeg.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/rimoxasub.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/gunofefokumenekojilom.pdfIn PDF document text
    • http://amandamaitland.com/images/file/42826875779.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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 11040 bytes
SHA-256: cbd6b293b10653a740044e6c4cd1047de1c38a9572ce8d4c4d2f38ef37c21c97
font_01_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 17392 bytes
SHA-256: 2e998aff79cd364aefb859e001f34d3d152368f3bae786f8ea172371904b41ec
font_02_sfnt_off00012a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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