Malicious PDF — malware analysis report

Static analysis result for SHA-256 d515d696a3a36cb3…

MALICIOUS

PDF

86.1 KB Created: 2021-09-10 13:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bf95502f6f77b836582984416fb55bad SHA-1: 8c3e9cfa973782d6899cbdfeb77e473efb83546e SHA-256: d515d696a3a36cb348b16b1836192330553f7f3ff1b04a2b8bff07e80b27bb29
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, suggesting it's designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JS points to T1059.007, and the nature of the file suggests it was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=day+trade+futures+online+larry+williams+pdf PDF link annotation
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/zosorupag.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332516e3bcb---70554481871.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/13121686180.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/vefosolifigoto.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161327f45378f3---9385324550.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/1d504ec5e7ee9387ae408c7886085d3b/45172485050.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/mivekon.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/pidobafuferuvujezolosulax.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/lejekokiforoneseza.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/gegulidatisujobogeruvida.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/67269176935.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/39508757319.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/wirapekorexawe.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/1183593271.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/tivezilumapurijudage.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f309df2307---55509562284.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/penunubevulek.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/vezadoju.pdfIn PDF document text
    • http://hiniceshine.com/upload/modabezawizigezabuvezine.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210906_232501.pdfPDF link annotation
    • https://icon-studios.com/userfiles/file/jejibese.pdfIn PDF document text
    • http://rld-carbon.com/file/37186301248.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/wuwevekojivot.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/0mldpfk6c9u3u98dqhco8babkn/donobopozegosabisewero.pdfIn PDF document text
    • http://www.ximangsongthao.com/app/webroot/uploads/files/konejidazorog.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/98040189547.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_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 17800 bytes
SHA-256: e7e4729a187b7d72812d913fb9f4a63d59151566e7c876fbc7fe58c8f1b2e70c
font_01_sfnt_off00011872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11872 10960 bytes
SHA-256: 1615f29e3fd2e89c2c37d3f8238d7ead1c5df84f8b6584c058f305596726f0bd
font_02_sfnt_off000131eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1