Malicious PDF — malware analysis report

Static analysis result for SHA-256 7007af22c30348e5…

MALICIOUS

PDF

88.9 KB Created: 2021-07-16 10:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 61148523bdaef648fe077b8e597f919c SHA-1: b502f386c1af92a5a52ad2c7d37df9e10e79fc1d SHA-256: 7007af22c30348e57572f228f5bf988eeea48c54e3373304ee60d597554ea94f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The document's structure and the presence of multiple external URIs indicate an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://queure.ru/uplcv?utm_term=cheap+trick+in+color+songs PDF link annotation
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/dgntcv26q3lshjcjqccbughg2a/peweratilizuvev.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65cdedea93---99284823301.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/a4bc1f55caae381faa493454038704ca/popidojep.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3aec9096fe---47681521622.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7dfd9b0d---95113650707.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/82775497988.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af1c425a431---16713995429.pdfIn PDF document text
    • http://seja.lv/assets/ckfinder/core/connector/php/uploads/files/juzuxamexitu.pdfIn PDF document text
    • http://usmleworkout.com/files/file/kezoxinefomoj.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/53917075827.pdfIn PDF document text
    • https://scheidungsrecht-best.de/userfiles/file/71721124209.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc0e009ebf---42117671572.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/nojetipukodiw.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/44773643275.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/d19dba4a20da2c5ec0bed191bbeb7fbb/97798297277.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/19264f696effa8ff215cd34e89e0670a/53361462083.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/porusewul.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/vuvuxavidedil.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/44847669430.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9737fa7ef9---16242191038.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/ea754d3a7fcaf288465baea8f262a6d0/vogesigifilu.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/ui05fjp6akca8k3rbb3qtvr8a1/kibinupapuximusonizen.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a185818570d4df7aae35502730310980/12418310479.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f58d0aa6b---wofoxifelume.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/276714c024c78f5afb3db56312752905/12271051689.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/64064296820.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_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 17632 bytes
SHA-256: cda8f0f2c631e4696c97221e94dbcd6ec52cdc56c5054cfd30b0383795f19feb
font_01_sfnt_off000125f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 10776 bytes
SHA-256: 98d17172a10b85f2bfa2509f69e9ab60dc5e09777d115e3f70c026ce1282c877
font_02_sfnt_off00013ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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