Malicious PDF — malware analysis report

Static analysis result for SHA-256 580488e50ad56ac3…

MALICIOUS

PDF

112.4 KB Created: 2021-07-06 03:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5de2e552a5c35a3ef3fd03318c7f38c6 SHA-1: 43842b7b46d407a61149fd0915a8c76544d9c1a8 SHA-256: 580488e50ad56ac3ebfd0a231030ccb862014fc1806f25fac7802b039e404d89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external URIs and link farms pointing to compromised CMS upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://garglob.ru/uplcv?utm_term=ogata+control+systems PDF link annotation
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/29357dae7b7c2e329d0c57af8e6e495e/89106340574.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/0d424bee8157827c616f5851a1b6236e/ramux.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de45e738ae1---regitoxetafasazeruxe.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/gimewezikemugupigabu.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/bonuxenajebofemazujezixav.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-7/20210607055847946186.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/bl3pvmigf8mtlq628n9o0oa0mo/gebanutazag.pdfIn PDF document text
    • https://purmoradiatoriai.lt/images/files/ribibivez.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c3ea6de93---41455088001.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/vr6u7g1bndos90342u7ounaonr/likutujoloj.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/febezofudure.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e8218b237---kizofuvodewokepot.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160799bde13e3a---94392387375.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a05c56a5a55---88483171882.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a131247a7d0---losiwubegujodawojokazobi.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/1600c97b8805efdbfa312dbab93d2752/26792545868.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/763437047.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/jidegojigemevasof.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e6bc911ae6445e52a85a85b68518ab79/59205757738.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/dadarenipo.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/bf9ec9c6dfd5fa907cd96631f9ac487b/jixinuvabix.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A84 10620 bytes
SHA-256: 0b1dec0ddbb6d6398b5a5e2b17fd86327f765c79a80ce0d27ca4752160863a6a
font_01_sfnt_off000152e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E2 19272 bytes
SHA-256: addfcce024813ef88a9730a91b4792f42ff32628b30994e8b8da8bc64c9470bf
font_02_sfnt_off00018691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18691 16228 bytes
SHA-256: 92fda1b25503f708dc6cbcb85b4f1bb97b5387779448640943e6b4fc9e949026
font_03_sfnt_off00019c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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