Malicious PDF — malware analysis report

Static analysis result for SHA-256 648c0030053439e1…

MALICIOUS

PDF

78.5 KB Created: 2021-09-17 04:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b536053bd5da16f73845c914a7f61378 SHA-1: 0bce0f8e7b5f094e3dbde71d08be79fbfff761a8 SHA-256: 648c0030053439e170419a5b53cd95d03c40c67c277e31a49d4ec5f1b20bf808
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://philabc.ru/uplcv?utm_term=spreadsheet+formulas+pdf PDF link annotation
    • http://liburnia.pl/userfiles/file/bajanegodek.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/ganafezumejimutupufuj.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/11348888582.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/2kb1sgd4kqcg7cnca9773n0nc1/xesos.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/74853883910.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/bidifogabogonaru.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/26303499803.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/nesubiginerobuvuwosod.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/vinakixedovavesoparaji.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/jilanodokawimugijud.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/48650639913.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404524cfb38---zofekoxiduwapibusevajuxe.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2e672c129---wolisefobewejib.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/8954326123.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210917070644.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/16311078878.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/dapuj.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/nisowitow.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/68484150243.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210917_01199234EE0E6871.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/riposuralorukix.pdfIn PDF document text
    • https://rotitelor.com/contents/files/wuwifejamelobefafogovi.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/sugaketezokukijod.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1980cade2---20096703653.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/simadetulogelevul.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_off0000d444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD444 15520 bytes
SHA-256: cf7aca1a68c5a4dbbd521bd51599ab3294e603923b9bd50e66e12e12f0fabba6
font_01_sfnt_off0000fc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001143d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143D 10744 bytes
SHA-256: af130d6c93d014ab1d36cd8cca21c6a923cc4e638e3655e03d722f459a7f93f5

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