Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd1cfc68a1784be…

MALICIOUS

PDF

111.0 KB Created: 2021-06-28 03:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: eea642b2df8bf704f2d91a28a18bef49 SHA-1: 10ac343c53ef59126f412c5f16236e28007cd8ba SHA-256: 6dd1cfc68a1784be66aa00973c60de150dee177ff92a4d07a7efd4ae27153343
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host and distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of multiple compromised domains and the nature of the links suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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 http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844622b4744---36386225770.pdf In PDF document text
    • http://funperm.ru/content/file/15746537237.pdfIn PDF document text
    • https://biocoils.com/img/file/47724651966.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/fanaremozakases.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/tekorulofalije.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/xuxomojakirajepizajuduvup.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97feb0bcd---83517900160.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9281031b3---pasokesojemiwira.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6b00a1b8b---kepikesom.pdfIn PDF document text
    • http://foodchemsino.com/d/files/vasivevixavumebusobog.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/4hmg365p3r6qkomd5ecpg1s48f/26264988808.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f075ee2038---60239309090.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079b59c02961---35508310488.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7277d16f15---84790096025.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074015e4d0f4---texonuvijupu.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/terivi.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/78319013474.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/5fbdf571468c2cbec3ea06cf9da8d2fe/23922381746.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4d882c37cd98c6cf4e5f9b8556008a64/muponuxififesupodegokob.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/29357dae7b7c2e329d0c57af8e6e495e/89106340574.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/76d606c3f0db90f4f0bc7a68ff468832/44946697751.pdfIn PDF document text
    • https://isleo.com/i_photos/file/56394783906.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb03633549---58218922526.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/8931821327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+tiger+protect+themselvesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001356c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356C 10696 bytes
SHA-256: 93dbedfa50d77e8bb8b514badc81b567b7ea338ed725e950dffcc3b6fcd2b044
font_01_sfnt_off00014dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFD 17220 bytes
SHA-256: b738f4c81fd61ee5af805e4d750547844ffb8f6f4db3e4d102a7cc2184c603b6
font_02_sfnt_off00016778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16778 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F8A 17764 bytes
SHA-256: 9e84fed76b1352e0c494d2ade89a49e2061a82d5057dd0e36344a354cd769b1a