Malicious PDF — malware analysis report

Static analysis result for SHA-256 01af2d2aa6a24bd3…

MALICIOUS

PDF

73.6 KB Created: 2021-06-18 12:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 893673b763d900eaa75135059ebfbaa3 SHA-1: 7a7ddcb71989f93205120846d40eaebc94b46565 SHA-256: 01af2d2aa6a24bd36405880eb35037c4370657611e444d90f68b591cd668c1d4
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains, likely to facilitate the download of further malicious payloads. The embedded URLs and the document's structure suggest an attempt to exploit user trust by masquerading as a legitimate document, such as a translation template.

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://coretry.ru/uplcv?utm_term=haitian+birth+certificate+translation+template PDF link annotation
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c88af62f1c---dejoj.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608573a7b36be---mavujimafidiravukus.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8750_20210603164436.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/fudafugiluvivaxeviz.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/51827008563.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88e1c397a6---xuleri.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/467ed0df4dcc743944f056a8b2f39225/65898238770.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/eub7vfjsuo38hnaiq39u6do163/dudinazegaridag.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c560b868d5ad1d1bc600ba433aadb8e1/68951209505.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/77342362416.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/95302407400.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/cq7dvtask94f7ip9huiqeq5ag6/92576775701.pdfIn PDF document text
    • https://airbays.com/userfiles/file/turunupa.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/4285542207.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_off0000e26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26C 5356 bytes
SHA-256: 331bc4b9bc55a6c02812d7396b60d8ab5036ac9035b9b5b0c2ee59e1ba25ad17
font_01_sfnt_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 10672 bytes
SHA-256: 8ca3a43fab935c5c3eb574ce254276f6f7254f49185b83e95ecf17a6dcee68f5

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