Malicious PDF — malware analysis report

Static analysis result for SHA-256 87bb29eab3d9a5ad…

MALICIOUS

PDF

75.3 KB Created: 2021-06-15 10:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd4cbe94f1be86ba7307b520783ffcb2 SHA-1: ffd813aaf6373cad1d9277bb3b49d3cf945d9032 SHA-256: 87bb29eab3d9a5adab88c7a28fde760ede264b5909f5b9379dc7ce86bd94a5cc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting it functions as a downloader or redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Adinkra symbols and meanings pdf', likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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=adinkra+symbols+and+meanings+pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/c652acc1e4d725cd115029cbf5bd712e/43845367565.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/95fhi86g4hc6u0jclusaeeutg8/gazitetodixavatig.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/c94bdd4486aa7ce508fa2f1c513eb2de/bagivogetupixusil.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b655a513fa8---kufila.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/931f5a315114242b7242f77f6b2753ca/62090552035.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ee3852977---pajezurega.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nrkuq8qn4rp15esm5keql54u85/zopegogotigajujirudika.pdf
    • http://157.230.241.115/image/upload/File/18979729043.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/jalopexadekexabak.pdf
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/tuzikusa.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/03d62c06358030fbc15e4db07bffd8d0/laputunowejuvinonisijo.pdf
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/sikapodovipu.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9dcccd2a8841a9b95ab1e4c1581a6c4c/tanuxunanatudegag.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081c40a42f45---xupizosonapifaxi.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebf983e548---39626785817.pdf
    • http://travelshops.pl/userfiles/file/besuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c8.bin
a67e92ce4cb536e69dacb635aeef3e1ad59396645ce1ee4f286b0821181a2a55
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 5656 bytes
font_01_sfnt_off0000fc01.bin
8b60a7280a2f27a5a4b562b5e6e2546a756738b0ba02aa852e432b2c35a89de4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 10676 bytes