Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4512c44748ef85c…

MALICIOUS

PDF

87.6 KB Created: 2021-07-17 11:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: f04a54b1365d48278c55d852fc275eca SHA-1: 3b41beab70ea5c27ed6d09d775d6e3b8b28bc7ed SHA-256: e4512c44748ef85c173431aede51887c088f0b591fdeda19ba9f0df744fdf42d
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it is a brand-impersonation credential phishing lure, specifically targeting Facebook users. The document contains numerous links, many pointing to compromised CMS upload storage, designed to lead the user to a fake login page. No scripts were extracted, but the presence of embedded URLs and the phishing lure strongly suggest the document's purpose is to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cheat+unlimited+robux.
  • 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://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0ed774b8c---febirixopij.pdf In PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/wapuropozuvogijokofado.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210523185844.pdfIn PDF document text
    • http://leguido.net/files/folagosumoza.pdfIn PDF document text
    • http://gonuldoviz.com/upload/ckfinder/files/81742101057.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/d8eb081339258604bb093fb23862f241/matidepokiw.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ec2a99b037929b164ae991877fb4f940/84924793642.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/92279093551.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/bebalenepenow.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec1553d76---48525756600.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160924eafdfdd5---zazavilumu.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/10077868248.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/42125069799.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/gebivatuzuk.pdfIn PDF document text
    • https://ka-base.no/images_content/file/5443194841.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/26519295332.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b81164986---40447837021.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/21832ee7c79ee470cd46d1e6cc6a66e7/75677568931.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a32c75fd60---85248300821.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/48a29ff0dd1cc93a681a926d13868106/62479121269.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/20a1ca1596dfba3d37545a28a4ccad4d/81884874164.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/dopatemafafowigavudu.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd9918b657---zujuzogejezoda.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc5b439502---81198646397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cheat+unlimited+robuxPDF link annotation
    • 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_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 10716 bytes
SHA-256: 20423730ef8417eca448b5fd9e7d5e451c09f5305bec7fe959f3fb4008fb3baf
font_02_sfnt_off0001227e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227E 17832 bytes
SHA-256: a5136865545e8b7abad1d6956154d927f650f794f7090006b0880660206de344