Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b2ad16e3151004…

MALICIOUS

PDF

87.1 KB Created: 2021-08-11 13:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ef1db7272002053b19b5e7a1a11ac14 SHA-1: 200f35907e4ef92cfb59ddb68dce69ad46574ebd SHA-256: 93b2ad16e3151004158a4a40e3021e307aa778516760e1e378f86722c0ee6931
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://chcial.ru/uplcv?utm_term=is+a+free+online+will+legal PDF link annotation
    • http://fanta-life.com/userfiles/file/72900817324.pdfIn PDF document text
    • http://juha.be/_files/file/fifobapijiromomibixejafip.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a846bd81d16---83161014833.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a105ac43924---94105850915.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/90004023250.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f0991486---lukiwukexejikitexuxidewu.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/numujubev.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc5b101619---naxalu.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/938b829ebd612d7c8e58faae604caf9f/88835715266.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/24699373722.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/kezogowojovigisazokera.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e443d5642c---93178498919.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6634a092f---40222474148.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/apv56a41r51r5qs7poa13jr2p4/bufazokilukajosigujita.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/n5d3vtdck9apvus0lhebqafuk4/13315051281.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4153c14fd4---49657151450.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210802_145502.pdfIn PDF document text
    • https://kristinanamaste.eu/files/44317064780.pdfIn PDF document text
    • http://adveotec.com/img/file/gusugatuv.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/49117258803.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a99e05b3bea2709112011611b751e7fc/nokiwatafakotap.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/9050167687.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/tekaduni.pdfIn PDF document text
    • http://synowka.pl/galeria/file/51332654719.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/kefamijoku.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_off0000f32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 16628 bytes
SHA-256: 5e697a0e5f129a001c61e4e630f1e4c82faba8ec36e7a2b7b65b3bc46dd14054
font_01_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13646 10328 bytes
SHA-256: a171a8ad772f8e430dc3f8789ac166fe245d3ebefbb9f267c0c06cac2458f716

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