Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ab99532110aa58…

MALICIOUS

PDF

69.5 KB Created: 2021-10-02 17:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 19f1c60c910b50dc86853ad2c518bce9 SHA-1: b0f000ba62b4b2737a546e72e5c6522a4aad6f28 SHA-256: d2ab99532110aa58c1c929767ed38bf250d6ca4ffe7e73167ac6b68ec4f1ddcc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URI links and link farm heuristics indicates a primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=long+life+dairy+products PDF link annotation
    • https://juniorclublivorno.com/sitonews/images_upload/files/24600953664.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/7235645521.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/devisufutanobaz.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210930_817DC6B8AC3383A5.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/76513724640.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161506f9a96e7c---71914424064.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/putukunugi.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/43528540351.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/64598423690.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/ruwunum.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd8189c12a---rodew.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/sixuriruwamog.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/pixozolisorefetej.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614bef08b69fe---21958713792.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f65fafd67---fubub.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615096f0da559---88018366809.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/eac922b0a9c5c47f64a39330e26da798/22204766618.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021100102114756.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/tegemipelitebitalesa.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/todetinasikopojelok.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a4ab24503cb02e7ad2d994a9a3852f9f/51734054780.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/21409928739.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/lilup.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_off0000af4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4A 15768 bytes
SHA-256: 64aac2c2f8bfeb4fde115f9e3038f7c774d96ba381b4f04666a739b6272528c9
font_01_sfnt_off0000d743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD743 10964 bytes
SHA-256: aac66d41095f8d15cf2e6a87d0b685152ded1e910f5ecc649faf52fc58c2ce0b
font_02_sfnt_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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