Malicious PDF — malware analysis report

Static analysis result for SHA-256 201de2f72dece6c3…

MALICIOUS

PDF

85.7 KB Created: 2021-07-07 11:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: acaf3d60cbecf1925168050e9d5eedd8 SHA-1: ba3839ec8b0ea80dd076c68c5c47766a69e03fc6 SHA-256: 201de2f72dece6c30d68b3a3cb4e6c7b27963931bf46fa1d6f7389ed62b9e041
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=taxi+near+me+open+now PDF link annotation
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/e5njmeut0j5bqfj0mkkj03c8c0/71893120836.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b83d8b20daa---62594787129.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/76465398490.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/13rg7khdr1kstvbr77aoqpac6q/bigexiluz.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/53870855069.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/35416282960.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf8502c8e0---80330981430.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210505155134957420034.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/72771796932.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075bcc0a08f5---velisewakalugemimajaja.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/kewigobireriguroruj.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608f50db3a83d---33823821240.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/10235408709.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1cddc4dc8---78174182430.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/sepedu.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f04b38c81dacde999a7d8b8add66c40/67616829069.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb02d8c460---jidulosarogafuwazin.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/bupaxadupizo.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16094682420871---vovujutibotawosowufanafi.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb2369cd02---lesisavisuji.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4d302005---padexizofalobezola.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b28bac4d6---28025647664.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/sonagab.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_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 17204 bytes
SHA-256: df992cb2752c22fbd4ff61878ba997b5374bb7fe0d2ebb5ad6c0cf5e2d9c185b
font_02_sfnt_off000132c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C2 10252 bytes
SHA-256: f9f6b7a6b7dcb0bc9efb8e11c950581382ebe817e03870c2e7295d532d61ff6f

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