Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afe04256982ebd6…

MALICIOUS

PDF

93.0 KB Created: 2021-07-07 22:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 70716a21d3faa1a5a9486cdb57fd91b1 SHA-1: 07804d83d3372cffa2cbd56b5a26282468dba543 SHA-256: 6afe04256982ebd67ecfa371e9a5e0207fd83bb1cd07ed12ea0974902910a209
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2af69a2d1064e41909d06994ea1e1831/mosuk.pdf In PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/49306596990.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/bmnehvnfdcu28e920um4qsj707/fewarisavudizotodi.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/68f090e05acb7e37ba031534888ff886/48045596160.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/a30ef26dc31e6de98fe56b8f94019c8c/wapilizofakulisafeti.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c310c958242---kugaketa.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/98a13f418b9110972f6feeb256604c3c/migobotivero.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/1684662a5f84b880a9d27ca8a1da7fe4/tagana.pdfIn PDF document text
    • http://abnicum.com/files/file/bapebologutirebowuzilix.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0de10c551---58799674558.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/4r4qmctagqpqc57v7ff2vksckm/dobudi.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/54714258864.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/sovapojotimevivuza.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/kudebevap.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bcc56156c---rilubutabij.pdfIn PDF document text
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/sipuli.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/iuf286dgvn8aqqt15mkjtpecc7/11964192501.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/gasajoluzi.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/66037472189.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/57926254931.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d27f9724ae5---sojefapupefinekupisu.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/xakovoziguduzafoboxe.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca67fdee32---94921479672.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa3202e4d---xamimokovutotem.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/44119160852.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160879d16effbd---57655804411.pdfIn PDF document text
    • http://thaide.org/userfiles/file/17036180166.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/47763995961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=father+of+modern+biological+classificationPDF 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_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 17924 bytes
SHA-256: faf4efd3a421376311beb1b902a4b424551aac16c77b628638e8f701a4db63f9
font_01_sfnt_off000134ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D06 11040 bytes
SHA-256: f08fdaff4f6fdcc5a5755ffd3bdd31d2f202ddf47fcfa1361d6cbd86c217462d