Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8af573b93f571e…

MALICIOUS

PDF

95.8 KB Created: 2021-07-19 06:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b40577dc39dd619f29ca8625f8ca0dd4 SHA-1: e1fe12596a3a9a2bd6e82c06dbbd315a7198917b SHA-256: 0e8af573b93f571e28338c82eaa31f87e3776713e6be9197fdc15c7c73a4da6f
176 Risk Score

Malware Insights

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

The PDF contains multiple links to compromised WordPress sites and IP addresses, indicating a phishing or redirection attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly suggests maliciousness. The file's structure and embedded URIs point towards a phishing campaign that leverages compromised web infrastructure to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://bawaconstructions.com/editorData/file/97743091362.pdf In PDF document text
    • http://canigrup.com/userfiles/file/jixenuvumuriz.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1cd2f1a904---kajamejisubiwexe.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/borijufatutomawetasozapub.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/bupuvulaxefutu.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/71050865418.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/bukapot.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/56392680459.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/80559941795.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/69370241307.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985d57b55e3---vowexujawefobinuk.pdfIn PDF document text
    • https://aokman-drive.com/d/files/78550546269.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075353bbdde5---17621946927.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8ce0e395d---fudiwos.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/tuxerozux.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608677ae04016---vatil.pdfPDF link annotation
    • http://presssimayeshahr.ir/pic/file/24224109175.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/85872627427.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/98546256955.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5225bdb64---vilikirorutixuzozosedu.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/45110370924087497603e5135838673c/37784392938.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1f189d679---84861240367.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160dde4847023a---73617248301.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f532a4dab0---9319084890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=udm+pro+quick+start+guidePDF 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_off0001122d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3F 17860 bytes
SHA-256: acd32b6b06d131d1d34087e8b1cbb7acf1e7f499c0f041c231844220e1f79097
font_02_sfnt_off000158ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158CA 11052 bytes
SHA-256: 1afe6b45158026686f585e4656c75ff5d6b5f91954368ae3b5b4efdaff48a095