Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfba7dac3dc30022…

MALICIOUS

PDF

92.9 KB Created: 2021-07-01 14:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2fc1c982de09767ffef56d3a415b993a SHA-1: 500925119c5402e0d59f95a332b0d00cd6dac200 SHA-256: cfba7dac3dc300229f5e138e5d6f152b52647bfc0ec2d4acaa2a6645c557ede2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded links, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b45f820c471940832d60d47eb487564c/soxezabulo.pdf In PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/egr0maesv27nutr8q2l0bdn3cl/likibotesosodoxikul.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc075c5cd3---16987820825.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5302142f0---nofijaxum.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/minopeziwaxawetap.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/43197370327.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/40069626904.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/f5444f181a22dbd4f606714e920e0cf1/safizanafomubi.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/potuwijepuzapopetun.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ad26dbd1d---dafuxadokojesu.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f26cc9d829---jufazufez.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160820b55d7928---41379605604.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/snaui2gmo010fvp2l6icn1a6mq/35692419717.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1a6480e5d---22677902460.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/74149954158.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160c904e1b5ac7---lubobetudab.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/mivapegili.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081c6e798539---gubusidas.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f6b5b1bffe32950a03c74fdb220f447b/37445117794.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5479a9e913---wegizisejirexagusofebulim.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/76311567256.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/22256055364.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/47833127764.pdfIn PDF document text
    • http://kco.su/userfiles/file/gimafanoxegugunosut.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a3e6de5f1---voxima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=convert+euro+to+aedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 10132 bytes
SHA-256: 1700e5b7e30d71e4651ffab9bb5cbe50c1070f51eb98339d0665b713de706cdd
font_01_sfnt_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 16224 bytes
SHA-256: f16fabb0aeb7cb637f0b528602d0ea764a69c63e0d6ffde2c5fa4f8fe93bd876
font_02_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 17776 bytes
SHA-256: 6519aadac220382397b271213f8e2a9acb931871e316432329023b6d5630f443
font_03_sfnt_off00014c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1