Malicious PDF — malware analysis report

Static analysis result for SHA-256 18878fe0485b2003…

MALICIOUS

PDF

75.2 KB Created: 2021-04-15 16:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 86735b1d0b3a7243e41359ce8fa8d5dd SHA-1: a71f528f9ca4c4143170859e0cfa563be93f2040 SHA-256: 18878fe0485b20033dd32715dcb5e039ad9e61705168c1d0c5aac209b1d17768
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection as Pdf.Phishing.Trojan. The embedded URI points to a suspicious domain, and the document body, though heavily obfuscated, contains text related to programming a garage door opener, suggesting a lure. While no scripts were explicitly extracted, the PDF structure and external links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=how+to+program+car+to+chamberlain+liftmaster PDF link annotation
    • http://boforotaje.mywebcommunity.org/cellulite_de_la_face.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_5fe9cb9f8ad9f.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/5658689.pdfIn PDF document text
    • https://pinafizupefed.weebly.com/uploads/1/3/1/3/131380591/5389794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_60371fdd5b589.pdfIn PDF document text
    • https://xotubowewetiner.weebly.com/uploads/1/3/2/6/132696149/72b824.pdfIn PDF document text
    • http://gloslides.com/mogopapebyanw.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/6177116.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/calidad_de_vida_definicion.pdfIn PDF document text
    • http://watogoda.mypressonline.com/amar_o_depender_walter_riso_free_download.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/14937069841.pdfIn PDF document text
    • http://vvinorama.fun/fundamentals_of_human_resource_management_gary_dessler_2016df19u.pdfIn PDF document text
    • http://kartaidatodemeleri.com/agorastur_formacion_oviedoywrng.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_5fd964018f61b.pdfIn PDF document text
    • http://2gusevshop.space/towixunibudaby67lp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xomepixo/audio_bible_kjv_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfde275a-10aa-4ba2-b4c6-304387728aa5/contoh_surat_lamaran_pekerjaan_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3378ba-2291-4b1f-b4d0-7297b2f7eb2a/vususinexisosovosuxeso.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/moral_stories_in_telugu_free.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 5624 bytes
SHA-256: d79342b39f457b7d6cf02d777467bd84121bcc327d7b5fc51d8745f91fbdc46a
font_01_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 10920 bytes
SHA-256: f4dfcd959d80d22954df6a9391e0e173cc9d76b1f6628af4f16f2fb5aebd0e5b

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