Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef310e95f077b05c…

MALICIOUS

PDF

73.1 KB Created: 2021-06-14 15:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6dfb2a42f0ac9ece66cde9c5b61f41d4 SHA-1: 2c8a83630623ab11a83123ea42a9bbae753160ae SHA-256: ef310e95f077b05cb6b38ee6f3ea10bb5c53f00567a6fa0170c76d658eb6d0e3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised CMS uploads and disposable hosting sites. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=beat+saber+hardest+song', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=beat+saber+hardest+song PDF link annotation
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/smofe1qhf4sov52dvil9fuds9f/zowurezofubumi.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/favulivukokukatasixibeset.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bo57v4tg7c6taqpn2o9l8786d5/bopapunepeva.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607d99d3ac65f---jadeladifubilaveli.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/77c651fbf26496574c8c3e7e34e8a4e5/pumutefasekafed.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/e0962aa2c1ffd1f8ebe2ddc87382b5bb/gepizexixagegawozobovikad.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608193a57a374---739417330.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/d2e739f32773b455aa7fa6902af8c0ab/dorufenugorokunote.pdfIn PDF document text
    • https://agermag.ro/mm/file/49449445177.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad202d7eace---menagokufijin.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082e2cc57511---94917262902.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/21849858631.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/24a92ecce7796baacb6984e0f012c1cf/51045805453.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a22657649e0---18990495900.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/58641795201.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/5554c14fbc5e3750da9c8fe77115e599/wakujuxu.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/mofuwaxasejezimimekari.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078662dc940f---nowasarenovikazuditufam.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c928ed796b5f1a20bd68f25b6b3c6e06/netatabofivurodilapogiteg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 5244 bytes
SHA-256: 02d0f1f533be5864788866349b412edd98901eb31520a8c4c503f7431f448120
font_01_sfnt_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 10592 bytes
SHA-256: 066d2f3440431e90047b5e9a29268e8abaa6bcd07dcb322030d8ecaddaf79d3b

Open this report in the interactive analyzer, or submit your own file for analysis.