Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c62106e7a30901d…

MALICIOUS

PDF

101.9 KB Created: 2021-06-27 14:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2f08cad4f1652cc863e84776efed310 SHA-1: 3fbaf3deee9c2f940813bc267cdaca68d572f878 SHA-256: 1c62106e7a30901d2b9169663956ba238a3b8aaba462121b5f58b2c8080af4df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/sa9ufc34drd50g49f7uu5i320f/16790440427.pdf
    • http://www.biotanika.pl/upload/file/minufaviwusegenof.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac013d6346---19254315649.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096c5347936b---62878679120.pdf
    • http://luisacortesearchitetto.it/userfiles/files/gelurezosanibe.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c45f64be04ff308b6a63ce772e6a6676/9671393477.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0aa4ea7a8a069829df8d714baf8d79ee/nenavupomivitotijoga.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38d4be1062---90224132459.pdf
    • https://urbanlivin.lu/userfiles/files/rivesafov.pdf
    • http://nickels.design/ckfinder/userfiles/files/zoxitimuzofoxonewizal.pdf
    • https://247hvac.ca/fabulous1/uploads/files/jugekasugimej.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7188bb6469---novat.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071db5a1f2b6---xepewinesiwof.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a342da445f8---90007779724.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083700b315da---3904138700.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/be1785ef41bc751b6b741835296e1de3/96961573549.pdf
    • https://lymfologi.se/anvandarbilder/221/files/91077165726.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/2f84qe6tgv8u6fn5jo2b8kdbai/82784150906.pdf
    • http://jtipartner.com/ckfinder/userfiles/files/mokeduv.pdf
    • http://qca.ch/userfiles/file/90570729221.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a32e2077af1---8740757052.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f0e14def---54764425403.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/56270cb08d7d53ad538b28e53d41f702/91066051842.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072a46212751---baxudesedenotinumuwig.pdf
    • https://privatecambodiatour.com/userfiles/file/wigikiwolutup.pdf
    • http://banghaija.com/userfiles/file/53860322069.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=metaphors+for+sweating
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bedea154d---75781308339.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e91.bin
225c53d5bd0687a949985f2282f9f3d1d53bdebb39041466c2afd5c26bea84a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E91 16988 bytes
font_01_sfnt_off00015a77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A77 16792 bytes
font_02_sfnt_off0001728e.bin
9ae6e978ac5f2508956af6de60c393f696043a57a884d38731d54a346b0fd6af
pdf-font-stream PDF embedded font (sfnt) at offset 0x1728E 10672 bytes