Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd42dc071109f400…

MALICIOUS

PDF

86.1 KB Created: 2021-08-20 21:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 3af0be06795e4307898be16713ea9b8a SHA-1: 30d3b6f2624d6d920a9451ec8436c983f14ab6db SHA-256: bd42dc071109f4004cabaaaf1e9fb515f00dbb3966d24e7620900017416fccd7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to exploit users through deceptive links, potentially leading to further malware downloads or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/d40c3a7497404bd6fe58ce398b3eac2b/95579633122.pdf In PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8b6710b14---34899567879.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c925263c2cb---dikukawulanipigete.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/75227627411.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/tobolemiwavatufixumi.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/li2rdmbq61j6hgsk3373jlj1ab/79812115465.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/72147282715.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/bezigeruxefuzabuxoberodep.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/jutelap.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/7988e579f2ed4c9aefac270d8d697dfd/32504682759.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/60a6499ea741897de496ab12d6998228/90091754669.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/20578887397.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/94631683592.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7580dc4e7a45aeb28f54410703a33b4c/31142131347.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/27604929252.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/97182983249.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/6838043586.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/bolekugor.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/kabikikalegozibunijudezi.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/pevikujagenakiba.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5fcc062ff8d957b8121b869c1e6bdd50/12777159955.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/26779529523.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/xuwitaxetofaberate.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/wixuwovilegesugewawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=algos+pvp+fit+2020PDF 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_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 10324 bytes
SHA-256: b788edc8df20595df0e7cfc57af84d609acf0e4e827f5550f4a848c7909f8085
font_01_sfnt_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 16804 bytes
SHA-256: 72241dab93d67b8219696e9ab0121747f7376c70da73b2731a8934437c06670d
font_02_sfnt_off000131cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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