Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f47e322cb17d812…

MALICIOUS

PDF

129.2 KB Created: 2021-06-30 05:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 144d815cc89bcee8169fc11566db619d SHA-1: 1b1faf27737743c378afc65e7543155e98465f26 SHA-256: 8f47e322cb17d812e91e8ec30513e2b3d46f87de8300d5b87e732a5b7e67a8ae
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure as a link farm is a common tactic for initial access, likely leading to further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

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 http://gapoom.com/upload/fckeditor/file/nosuwifotesuwobalejubana.pdf In PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/01db5cc2fd19a3db14b069f99b95ff61/xeperomatorobijoxib.pdfIn PDF document text
    • https://ebooksweb.net/files/file/nemakosiwewopipetuz.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/ecaf81d09ab4ca1258484bdbb0a4aef1/60942326643.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/p9dqbfiejg308mugio7ql2u0o8/rojigajevofubinugopuxabej.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed79d467e5---gelufelap.pdfIn PDF document text
    • https://proxus.nl/file/61167990274.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/64651273171.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/99108589228.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b829c8149d6---betogituzigidiligiz.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/4vt181v74nsmhs0mm8ka5s5hhc/15629717502.pdfIn PDF document text
    • http://changecn.net/ckupload/files/dipawasado.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b87bd77ae0cea1e62491b880cdb147e/noduv.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081c5c4e2d81---nugibafikegex.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991cf606304---34878644781.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b69c0bee37---nemetulonumafe.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d168029d4a---koxarizizimaxelobubozenef.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160746c442e4e4---gimosalazixujiluxiwuga.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607093c98a65d---zotosizamukimimufapes.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/82300188723.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073675d914a9---23577813327.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/33174921168.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160acfac6ec665---15139569357.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/zarosisivubuzafeximif.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d9e0794124f0977276ad9e24e589de88/vuraw.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/70000240384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=two+rooms+play+pdfPDF 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_off000199a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1B9 10396 bytes
SHA-256: c333df5318f57a4b452bf0fc03a1966fe3528efd66b21d1abd24e8e2631ca119
font_02_sfnt_off0001c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C953 17688 bytes
SHA-256: 60b38d38f7d8d38d0d690c8684d2eee1cc5f33bcfd8c5174e55bb43c89b50cea