Malicious PDF — malware analysis report

Static analysis result for SHA-256 be00dcf098e2c71c…

MALICIOUS

PDF

86.7 KB Created: 2021-07-09 01:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49ae7f5adb63be9bfbdffb3ae728f628 SHA-1: f5b595a37f3844fe17a9ec8766d113fc7df563d6 SHA-256: be00dcf098e2c71cbab965ca7f946b6405ec41f061a3bee7680e6b38c6f8621f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710d97b3cc5---wazal.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/uvboge3mnaul7hee17v0fat5g6/46263450983.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b69d31d44c19dfeec28f13b2c4b921d7/galadaxegunar.pdf
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/37962342912.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/887c4647debcb72d41284145561a6a61/rapuzivo.pdf
    • http://optikametuje.cz/userfiles/file/99773726011.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/20b841a19142be1b1fd1a6be36a3d8b0/vizaziso.pdf
    • https://bikeid.net/ckfinder/userfiles/files/titozanojabatevibo.pdf
    • http://cosmic-kino.ru/sadm_files/wutanafapitiji.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/kaseduxowaluluviz.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6b398af6e---86530087183.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/efe156870b55a85bb9e6e19879904317/makulu.pdf
    • http://grabnerestriche.at/44573940040.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9e407cc4d---lopuzuzafimogojilalorefud.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16099d6f8138fe---berud.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d918f07e34---46092416787.pdf
    • http://boathousebrokerage.com/userfiles/file/voridorolaliwexeb.pdf
    • https://areicon.com/images/file/67398814832.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad10b10e357---gonotukejom.pdf
    • https://oncetrabzon.com/resimler/files/44537856265.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/zibekapowupogox.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7b18c3ba---19825444296.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071b3e8b2c32---degejemejizeragafuwavije.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/785t2plpln08lmjuj0rh8u4uhv/nigoronepenetelefanuzifu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=download+game+dream+league+soccer+offline
    • 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_off0000efe5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 16792 bytes
font_01_sfnt_off000107f7.bin
dd51deb58f5daab2128f94b35a9237fb6bf20467646a9e3778312680eb7672a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 17032 bytes
font_02_sfnt_off0001343f.bin
1ff917ea2b2b6025eb2802c65dc0c9fabaecf68e0275d506b54acf552059ac7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1343F 10908 bytes