Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ec116789155d8c…

MALICIOUS

PDF

77.9 KB Created: 2021-05-28 06:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9049959b473c2eb68c0427708fd4ce18 SHA-1: af82f2ff7e7ddf287884f3f8ece0f45898d9191b SHA-256: 79ec116789155d8cef36dd91cafd909fcc242c3ad6c603a7b7c506071fde384b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/uplcv?utm_term=huawei+p8+lite+firmware%2528ale-l21+android+6.0+emui+4.0 PDF link annotation
    • http://woodwork.pl/ubezpiecz/obrazy/file/kolil.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/343ad4713e58c741120e86652579c654/94319183190.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/e1d5e1a22340c98496cb9b79154a1a84/rupisominisezasano.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/98385518670.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/l3ua53mppkain1sp58ct4n3hbg/53959987980.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/f8ce9e13ed0ca4542efb3a1370399d89/lupexaxapolopelilizuf.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3e5198f9fe2dbcf1f49786129468f35/35257993124.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc48503c4---84100604226.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/5450647e234c7506938f9d5e89cf8685/ganuravifove.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f3227e329---tapimuwowe.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a890954d40d---nabusewoxovuzewutib.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/594e897f494f13de5cb3b38254db0174/xeruvabawojoxixafagi.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608febf3cc29c---75948928390.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/d8ac1a6d9655632f09a67371d26832b7/bajalolaravovaxemixev.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/50211240423.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759204a4bc2---nabakuxogopurovadazovagi.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/sgmh5hh03uons970l38scdk4pt/gopuvizuzazufowofexoxuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/785b503bbeea5035ee3f50b13f0d609a/tapifuv.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE175 5848 bytes
SHA-256: 678e34777fe45007e914d0c08a4f9e1931a1ce44074cd46ba96740e20afe3c1c
font_01_sfnt_off0000f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 12312 bytes
SHA-256: c399ca653ab5aad1b44339404cc770fe8d284997e0baff18365b45016b0fcfe3
font_02_sfnt_off00011c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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