Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9cc62cc999b5c1…

MALICIOUS

PDF

89.5 KB Created: 2021-08-09 01:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5eff93fa436ba520e11992b0a1d3dc7a SHA-1: a080e519330f174f769e42165a34bc15cd3822f4 SHA-256: 0d9cc62cc999b5c158b91227eaa9638d2c35ce7f616b0c57987cf794d1564f02
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. These links likely serve to redirect users to malicious content, such as phishing pages or further malware downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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://queure.ru/uplcv?utm_term=odwalla+e+coli+outbreak+case+study PDF link annotation
    • http://digilit.ir/basefile/digilitir/files/sireligipetoxu.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/34121039313.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/5f17d430d9a696f4531f7cdfe92233e7/wobelurixibiguwi.pdfIn PDF document text
    • http://erex.hu/upload/file/bezuzokakup.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/lawederijigaso.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701082b412c---22426928834.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/pvi1hfb5reuk4kvl98q2f88g4u/84229410410.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/1b57315f93cad83dba333cf9d8eda218/4581971842.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/23136800207.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/renix.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3f98efa06---poderoledek.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/fd14c921bee8718310b4797996b98b51/marijawunizap.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/lajibivugo.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16078a072bbae9---ketusalekifevugabukuzinu.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/71091837203.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086f05d75f39---titafazopixujadesogagop.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/gosapiledax.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/49750019104.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/93226480696.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/16537598004.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/83b43aae62db4b5bd23686a3d861dd62/jufudonifivaxumojanijuv.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607154bc7e9e4---purokiwiwujabuvasoresok.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/sunibezid.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f108d282ad---53458048636.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_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 10816 bytes
SHA-256: b2c979480353fef5d219e8adf648aa87a89dab726740664770ae109cd97ede70
font_01_sfnt_off00011478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11478 16872 bytes
SHA-256: e1e3fbaaf6cfd9939bc1da7cb257a9036476ed2ec6873b8e859418094f14a1e6
font_02_sfnt_off00014062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14062 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1