Malicious PDF — malware analysis report

Static analysis result for SHA-256 0383d3e6bb2506a1…

MALICIOUS

PDF

171.3 KB Created: 2021-06-27 13:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3a24ea8464ed50a1c937ca4ec94325c2 SHA-1: 6e0c0d78a4afcd9edfa8d836856f32e00ffb9098 SHA-256: 0383d3e6bb2506a1ba98896161d0ec8be72e6468629fa5b65fcaced24118c1d9
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and compromised CMS upload links strongly suggests this PDF is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9727

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://cructi.ru/uplcv?utm_term=spider+man+homecoming+full+free+movie PDF link annotation
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6c67a8dcb5e8540a5f69bfd1a9f3c9f0/77903778288.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/94864379038.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/22804143096.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/c6e8f59c20f4e873ed697e100511c8cc/78669731944.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096ae4ecfdcf---73115716912.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/27639682455.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097b4daa5cc7---58625656697.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/f90e6d3cffb08adf48db4ff136b8e907/65933990850.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/97117771441.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9839b5a665---gogobuketiximavamelitozi.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/sulugudukasaposa.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/59370917459.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/50c78f9fb71917da8993ba3e1ef3f868/veluwawowufako.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/755b0c22af995c469e9cf6c8d9b16546/tosuko.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a689c615e86---35422608718.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a533f97ff4d---kixenebobawugotebinowoki.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/e1f157d6330b5535e414a8c4da8383f7/nebedalitixirimoz.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/t7fq27dqdckjoam5mb6mjcou0j/10871826344.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/71269141434.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/89601660176.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916dd55b39b---29904389070.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/31107167968.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/1bdb706ee37206587f351c54aaf7d408/waxekukadubili.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/bateviluruto.pdfIn PDF document text
    • http://pinetreerealty.ca/clients/55933/File/woribilexafi.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/sojeganuzugazexawonikikak.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002394a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2394A 11040 bytes
SHA-256: e9287f45e9b95bfb49c9b5d312294a72d9167dabc00d353cc9da9e9435df2d86
font_01_sfnt_off0002528b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2528B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00026a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A9D 20872 bytes
SHA-256: e3c7c0645a5953f415ab2643c6af8a10a8e173dad0a289116f0b40636ac82311

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