Malicious PDF — malware analysis report

Static analysis result for SHA-256 714fd611139dfa02…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 19:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4d7920e772b0cb2f8059fe018f01c2e4 SHA-1: 31cb1f8d0b2aa29e3c18a943b30c7c9b1a74cc60 SHA-256: 714fd611139dfa020ff005f9926159f48dd2733305d4d706bd44580f18926a78
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, which in turn host other PDF files. This pattern suggests a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://medvor.ru/uplcv?utm_term=jesus+christ+is+our+lord+and+saviour PDF link annotation
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1609e49230cb96---pujiwimatugawarenurovijit.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/02faaab14521fece2d66a148bde8245c/siwikawu.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/ffc6c2a63a810a32012fc88e97752bc2/43327816669.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/winabumipajawiba.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/7743853912.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/4910ceefbe3591de73629f3e12719081/gepetuwixado.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/638a6c6cd0647dc8a41bb2dad563c422/77720553352.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/wugefofezezujowije.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/003dad0011b9947a75d1921efcdbc2e4/93922695185.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/26146995745.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/jukasetinojerotojeligodok.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16099e17ac5973---70925598374.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/766fd84c514fdb3137bc4ea752933f56/2087948649.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/jijinidu.pdfIn PDF document text
    • http://mousike.it/img_ins/files/libipafisuvigebiguzit.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e94a43b7188---bonebomanovagajasuxikexud.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16128278bca447---22549435231.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/70703822546.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/4858fbf31f042d512440b72a6868dcaa/fuviditurazidamafalemipif.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/22108576358.pdfIn PDF document text
    • http://namngonviet.com/user-/files/xawedotaxaxi.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f3946b781567a991589151b400d6bbd5/54320783628.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210609_091031_5592.pdfIn PDF document text
    • https://digireg.ch/upload/sinapebimewo.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab137e8d512---lunen.pdfPDF link annotation
    • http://leebyunghun.org/new/upload/board/files/83665355019.pdfIn PDF document text
    • 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_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10624 bytes
SHA-256: 2dfe4ad8529b95965cf96b96151f1f01879550b0d0c8ceda13813a185f71f2ce
font_01_sfnt_off0000fcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 17380 bytes
SHA-256: faad3552d4bb7325442b7e4c222d51d47efa2409cdb3dd676b839e5b0bbbd683
font_02_sfnt_off00012a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1