Malicious PDF — malware analysis report

Static analysis result for SHA-256 067c4cb460db1a44…

MALICIOUS

PDF

87.0 KB Created: 2021-06-29 10:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fac9b52b9c26963c2a776b976abed9de SHA-1: db78611e6d8f6322682262e8d16c304eacb4818b SHA-256: 067c4cb460db1a44b8e2b47af3da6f57eb7d9b67352c118f8cc6ae595f32afdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09036f404---15919304180.pdf In PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/c4aa85b2c0bef8c79d985eb89856f87b/99123371635.pdfIn PDF document text
    • https://defaico.com/d/files/wizubowezagoxitew.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/lubexujoruduzifo.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/pevew.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/26023116604.pdfIn PDF document text
    • https://jobtiara.com/files/files/pejapegekifipadigetodov.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd093642e9---lepes.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160889fc8d5634---90043707342.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210606_210345.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7795fa54---80295733213.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607145b00fb0c---vixalamux.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b8d7469a---57671148765.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608591be363e3---74734991276.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d7b5f1a423ef1f4f578c011e72d0d921/devazosimupegikawata.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/t8o8o7an5apajuano7k8dr02id/69830416400.pdfIn PDF document text
    • http://lg-palette.com/upload/files/jenew.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0249c6e5492c4722f8515489bfe8c917/3390438227.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/momuriliguzixap.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/jumamusazegin.pdfIn PDF document text
    • https://scriptdd.com/_file/file/79056551064.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/xevunajidozowogetuwoki.pdfIn PDF document text
    • http://gdgom.com/upload/file/2106132315453949259g3thc4eni3k.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/22301315094.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/19900769511.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=overly+manly+man+memePDF 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_off0000f31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B30 16976 bytes
SHA-256: 701a55c64c42f41f2efc621e860cc9932bd7c806126d65d41e7af79958a0a72c
font_02_sfnt_off00013746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13746 9996 bytes
SHA-256: bbe61ad9ee4f2a4a0771457bb2c07a110f9dc69169f38a1a650d0267a18241a6