Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7591add35482a8…

MALICIOUS

PDF

71.8 KB Created: 2021-06-03 01:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 007e38ec69a1353faa682dbdfa347938 SHA-1: c1ccf55ca451ee665605f05fe3d32da1fb72a427 SHA-256: 8a7591add35482a8406cbce15a1d6b1bb29336672835a868772bac335e35a430
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm pointing to compromised websites. The embedded URLs and the structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3b7ae63f0b9bb2fb5d6cc26df4402da1/lavewafukexabaxopadimogu.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/9023940600.pdf
    • http://agnieszkapawlik.com/userfiles/file/negudumetavok.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/i4pot95aha1pg1d5hp27qhanfb/39045237142.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f1fd8aaef---29630201582.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ddac6a797---tuzipaligarufatamone.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c6bf34646---37874152613.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/70e7952582e7acb1afb2b0adbd9e1067/34529873120.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/a3f48340fa4c0d053984673a52b49089/40584431051.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/74778114118.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/4c0b1bad4599b3e7705c8ca5335be922/20265838563.pdf
    • http://sxhk365.com/uploads/file/%5C/disew.pdf
    • http://nelly-design.ru/upload/files/5147102450.pdf
    • https://antae.be/app/webroot/uploads/file/38597513157.pdf
    • http://artospace.com/pics/file/66021727422.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ea9c42a5b---32221332256.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=gre+quantitative+practice+test+with+solutions+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8bc.bin
6e3aa5fc32dc95948b3184883fa5727e9a9a6a2113d8ccef06c4396939c5df57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 5552 bytes
font_01_sfnt_off0000ebaf.bin
6363b257ff16e80873210be7a500fc6b51d9349e48e0c2de57c1852cce30b24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 10604 bytes

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