Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c330674986b6bbb…

MALICIOUS

PDF

84.2 KB Created: 2021-07-06 17:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 39110128195a59b62d216c6b10753983 SHA-1: 243aec97c3a67952a46920c3ac1801c379928875 SHA-256: 3c330674986b6bbb5b8f97172894220e1df23ae25f6bf585fa527018fbc781b6
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely to distribute further malware or engage in phishing. The embedded URLs and the PDF's structure strongly suggest an attempt to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b74f1e2d3aa459c58a54c152b60c4c31/kepudarawam.pdf In PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed95f9e598---mutuwikeradoj.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97e022883---43424255851.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160914c7153080---nokunafojuxopalimejupef.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/30059452300.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/9efi0mu922fakc1pjtrk1cmo5j/84143785672.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160cff4e94596d---mesaribefejeworojupo.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/5a97677f068780a5e08638eb8a01197e/50407751948.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc00ff51491---lunomadiburel.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bab4db156b---65102006283.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/4de17db4acf9035093eecb1b99e8ab80/91525338421.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gazekogunikapuwodusojupu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deef2bde1d---16134146061.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/58716722443.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a4bd8311ea005832c419c3626741e78a/lizuza.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/u12hmji94qhbjflhkf1gjns535/kaxowazox.pdfIn PDF document text
    • http://m2m2design.com/userfiles/gafumebuladonudix.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a45b66cf3a---68474611305.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af9be8c8123---61262991923.pdfIn PDF document text
    • http://alltechsro.cz/files/jipavuxugadelewumono.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/93105df87d715d3437bed960d5b3f509/gedujigebarakurefefagixa.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/825955769.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/9e752fdd2cfb715067d69896f79b5c04/supimofiborepupikuwevog.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/binilorakojet.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607497cb2d8aa---gisolimosaw.pdfIn PDF document text
    • http://jaika.in/images/documents/files/riguwopixovevoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+elements+of+geometry+questions+and+answersPDF 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_off0000e7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 11208 bytes
SHA-256: 92366e1fe10ec4dcffd1b2fb8a66b41c60d7cb551603a7f05f390f5b2e21345a
font_02_sfnt_off00011964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11964 16296 bytes
SHA-256: a4143d6744ddbdbdbce97bdfa3b8bf0d522f16449f516e85fabd1648eeb6e22b