Malicious PDF — malware analysis report

Static analysis result for SHA-256 10521d1c4d3f0b36…

MALICIOUS

PDF

85.7 KB Created: 2021-07-15 11:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 744a80da3647611735cfcbeee92c8129 SHA-1: 422547d3d9cf3cdb6fd8256ce457a7c470406df5 SHA-256: 10521d1c4d3f0b3631bf39b2bee8717d7cb619b9d5ddef32a6a0370ab138921d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations, suggesting an attempt to redirect users to phishing or malware-hosting sites. The file's structure and the nature of the embedded links strongly indicate a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=2014+cvo+street+glide+for+sale PDF link annotation
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eb823cc3f---56150695605.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087ebcf85552---jigulisezixoguradiziduz.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/defotabo.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3186f968bdb1cb6090332ff2d18adf8/mapalosuvejuxo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3e1b6a1d0---subemuvivajonegibizi.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/69079209497.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babeaf8c8a0---24642294358.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/56810638003.pdfIn PDF document text
    • https://wrd13.com/force/file/kazowalegokote.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/qico5k6sum8k6t0tus31erg54t/tofojimekirujelazodemup.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/jarizaxilofuto.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/23d2p4de50l5s84bbggir38i5h/nobavuxinoponak.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/86080418870.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/0eg3dkun2mti5rq8n63mu6o8a5/60276037967.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/o3haus99mrdiqqoqi74dn5na8b/25319131121.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/zoxadopipunorokudotix.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c188e36234a---4418300598.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/kezenorojasevasij.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/nuviluvamewor.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210625111953672.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/6d217d4d7ed68a9b01101ccbd2f5d18f/buxapisesone.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/rodewidevuxoda.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/zagikamomenex.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/24822854267.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_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 17744 bytes
SHA-256: 3b6607088693e772c47eee61541399514557ef00c374962246c05073efff64b8
font_02_sfnt_off0001307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307E 10888 bytes
SHA-256: 1925b76e8006bdb2c3cc1292479e3090541f4ab54c200ff071364a2caed8e109

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