Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81dd5b2ce48da07…

MALICIOUS

PDF

143.4 KB Created: 2021-05-15 08:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d70861d539ba5f72ed5be2745a25a1f1 SHA-1: ec91889ddac6a29393054f977c51dc6919d5b2e7 SHA-256: a81dd5b2ce48da07a432a7364d666e0140886a3fbcf34b543becfad7b2d5f563
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, hosting numerous PDF files on compromised WordPress sites. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to distribute malicious content or phish users through a network of compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://geredekombiservisi.com/userfiles/file/94769372191.pdf In PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f342c1fd0f---fakamatipiv.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/97710746830.pdfIn PDF document text
    • http://renovator.cz/files/file/70604716916.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071658f40160---53749516227.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/36792345c3d3ba314072c4fae4e367a4/64040980953.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a5169b12d---33306750898.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/69j8cdcl8s9pkk5bloke1rqmse/93005151338.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098617d2246f---xavutazuwuvosetubuwivo.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608265e306807---bopegizodatanutixezas.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078e7596a7ae---zaxofopojup.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e86d7e4e0f---69284458854.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb60278598---19409378284.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/d261e43c5d6ff8da21891a266fe517c5/96942828555.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b32e1f12ba---zuwineman.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077143243727---14176214806.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c349dca4db---rexutenedubimojetileb.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/cfl3v2mv4nb0gupnlajvhfao69/17024951744.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=transformers+animated+prowl+x+reader+lemonPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E69F 4908 bytes
SHA-256: 41c3bf0ab1825751a211736797b161c2646ebf55bb17299f80fe84e0fc8ac570
font_01_sfnt_off0001f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7D2 5296 bytes
SHA-256: d9c426af849ee66cfb8f2390ac9031b23eb9d0d1584000394f34d1789904aab6
font_02_sfnt_off000209d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209D3 11332 bytes
SHA-256: 63fbcc906ab4e75aa5443cb44a6c2d2e7aacda2802e740f84eaf267199a45145

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