Malicious PDF — malware analysis report

Static analysis result for SHA-256 04afd6fe1d2d0a01…

MALICIOUS

PDF

118.9 KB Created: 2021-06-25 22:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 81462d75ef39ce50a0503be2c836700a SHA-1: 858421ac82eb2cde755322b39efb1163642999aa SHA-256: 04afd6fe1d2d0a013d0577a5f1e1f7ae457f1d45ef38d6e314588a287aa9c363
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://altonika.pro/files/fck/file/80784213880.pdf In PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/63468336826.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b2653fab7---10468614296.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/82315319492.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/44045ec0e86e000f7b971fec788273d9/16638301800.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/lozilu.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/69660061310.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b572c4eb6---lefixugagasunisofozi.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a24c8b2657---wudarilibajogeni.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/4729954061.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/72113790788.pdfIn PDF document text
    • http://vejwun.cz/images/powifaduzojorufave.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/28722786826.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16c620be4b---kifowomileku.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a83fd415e3f---fovukaluvojimuf.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/64373239394.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0526249f5d2649d89abf5090de8e70cc/pagetonavamofumed.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22fa20b95e---12555155204.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/37844053353.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4f87f140e---29293807849.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f0025734b---pubewowimawuxuzuxema.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/11280876408.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/baxumusafisoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=broward+county+square+milesPDF 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_off00016b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B6F 11028 bytes
SHA-256: 598dc81e4245174e4b222f5d68a49fef92722fe32118828e1c5b70e587a409fe
font_01_sfnt_off000184f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184F8 18384 bytes
SHA-256: 570c01a765a4c85122c083d7596e9aa1759961ba1e21910e9e8f8252b405bd93
font_02_sfnt_off0001b618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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