Malicious PDF — malware analysis report

Static analysis result for SHA-256 0199ad58d9272c5c…

MALICIOUS

PDF

88.9 KB Created: 2021-06-27 16:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3e9b2e8ec765880249e2345efef24023 SHA-1: 81f81c9e36c7abfec1d885b80aa0dbdfe26006b7 SHA-256: 0199ad58d9272c5ca816959e29f63de6e871ea1a98dada9c0ad3494d02244c1e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting, which is a common tactic for phishing or distributing further malware. The presence of numerous external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://hugslock.com/app/webroot/img/files/77320930999.pdf In PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad690bc1e17---ruwuvomawideze.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///17639264250.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/46c37ada2654fa9acc8c7d36fe609527/gowogetiteru.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160764430076da---burumapapekusuribudodel.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/c8fbe3721281ffc74cba7c0624066c17/roradajukudagimen.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4db2296bd---sigokulepimozedezamos.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00ba8cc792---91214322579.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c896fedc84c---fagovimisibolujowes.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c84de811af9---57230612006.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfe48cd3b2---73105418582.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/da5836916f1e7bc1c22c5525a8e39ff6/vexolobif.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/22ee4e6daaf3eda35415402cdefdde4d/77527054796.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/423711655a40eae6620a61d75520aa38/16207634138.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/wodenigizulasudesafudatin.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/66913b5bf117a623ec266f9de484f9b9/29244678157.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a1532737041---77993479582.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/98642411753.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b7566bc3871---favebovukoregexudobinebop.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160755f7089706---mepatof.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/el08jmv3ng6qv2dg1cjmfhruv6/32697567147.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078d70d43a62---24745834633.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/sobeponomazivito.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ke7l64s5e7an1pfomql77jf8qk/30265766638.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/54692027528.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/06d03b2406b15c0146f50cbf720d000b/danonigogimomaguvetu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=is+chicken+good+for+heart+patientsPDF 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_off0000f87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87E 10896 bytes
SHA-256: 9faacccc1ce58f5b0497bd65ebee6af5d1d8dc1de8791d8e02e5cbe5a39078c1
font_01_sfnt_off0001117a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001298c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 17072 bytes
SHA-256: 72ddf1a574761a718374670d68a7237beb1ae69bec307db90520b6a2cff9667a

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