Malicious PDF — malware analysis report

Static analysis result for SHA-256 005cd1f1d58f3202…

MALICIOUS

PDF

89.3 KB Created: 2021-08-12 05:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d884eb5bfb3e2e6c051b3becbc8ed57 SHA-1: 2f749429e162b569f0b0d89499f430ae4182f2ed SHA-256: 005cd1f1d58f320201d5856f70397987676e381a6e6c21d684227357814d6444
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm, suggesting its purpose is to redirect users to malicious websites. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The sample's structure and URL patterns are consistent with common tactics used to distribute second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://chcial.ru/uplcv?utm_term=caracteristicas+de+la+figura+retorica+sinecdoque PDF link annotation
    • http://agcslohian.com/userfiles/file/gofejuti.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18e1d8f783---guzenajezekuzere.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f7024678---18061233947.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/862ad1de2b3b55ec765a73ed7de71cb3/julemat.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/694424fb28dc35775958d3c427c4a325/1879088359.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/14570292284.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/3510689290.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c64ea0ef4b---pididodeduwedipikodokive.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a39c952cb2---66439347535.pdfIn PDF document text
    • http://ha-sine.com/d/files/71081333940.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/b0535ca5dc673939bfe6ed49a82a6127/difaz.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/ditisuwafebukix.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/lqpabhg6n7tecv4ce2ag5govc7/61792472089.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/3c38410c4722dbf530ab1d7eee833ccd/6592624112.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/fezezebetigirumisi.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/u2bjt7f2mgah0p21ovpfnp5ksi/7749751210.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/1f5b953ea92c85286257503b6fa72ad8/botovewuzufemulabis.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bdc6c0bca5b5b69a345b6cb160578d62/83429530827.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/6f84c9081c848c837e6626b51542382d/47146871296.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16107ccb291bbc---66897310275.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/supipeju.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/49520004694.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_off0000f5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A6 10928 bytes
SHA-256: 7952911229a10dcaefbd06b17695e8010b59f7c62e36c545f775e425e5f86e40
font_01_sfnt_off00010e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A5 18228 bytes
SHA-256: 2ec536fc79faa320f56689eab9f7578f7f7b3e708f8df0389158bfa099dcf022

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