Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbae223308c2de4…

MALICIOUS

PDF

85.4 KB Created: 2021-05-29 17:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fd29593fea1003c371b86ff4f43a1bea SHA-1: d3333de4a5953eef8e922602031c480cdeaa0fc6 SHA-256: 8dbae223308c2de47bba0292da47f32212e2dee8829ee0177a4b652d3916443a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=dr+eric+berg+keto+diet+for+beginners PDF link annotation
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/ziveb.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/nerijutexita.pdfIn PDF document text
    • https://sulogaxelope.weebly.com/uploads/1/3/1/4/131438888/piroteboka.pdfIn PDF document text
    • https://neruwutuwi.weebly.com/uploads/1/3/5/9/135960217/1899061.pdfIn PDF document text
    • https://mixenabunagoxo.weebly.com/uploads/1/3/5/3/135320093/posigimogi.pdfIn PDF document text
    • https://pawuxadatunu.weebly.com/uploads/1/3/4/2/134266652/xifupemunix-jovowunifugodig-tikanokexi.pdfIn PDF document text
    • https://jizirazizeki.weebly.com/uploads/1/3/4/5/134509590/kebutizel_lupezizebugazan.pdfIn PDF document text
    • https://bazeneta.weebly.com/uploads/1/3/0/8/130813787/b6973.pdfIn PDF document text
    • https://peguwuxawotenu.weebly.com/uploads/1/3/4/5/134582441/f86c3.pdfIn PDF document text
    • https://sinofokum.weebly.com/uploads/1/3/5/3/135316266/5e8c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71088e1d-caf5-4ca7-8acf-b6e27288153d/fovuduvimanogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16426ee7-0760-4765-94ec-d32159ee6903/how_to_install_google_play_store_on_kindle_fire_hd_10_7th_generation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bad176b-ed96-4892-9410-c484bb85fe76/taletanunajeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f63b568-2760-4ffa-8ccf-875a205501d4/zawuwubugulozepuvanuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2dc87d-f556-4b45-965a-70a4e8ed779c/27915689518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22db9d9d-c34c-46cf-8ed5-03a73bf51756/peppered_moth_simulation_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27980b75-22f4-4cfa-ad1d-ee6d3e6791e7/63292342564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063dec24-5f55-4f74-b794-6927b8057c12/pesowuvutatogubapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b48e51e-d6be-46d2-82b2-ebe91816e13c/71408914858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45836ffc-dd78-48b3-8106-2520d4527f28/sarewalafakaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb7e840-fd40-4fb1-a09c-05fc0fc4f08c/79373716408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c202beb-2c8a-472b-98c7-9a770f06f981/jigejib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86088965-172f-4eb6-9b00-85b8c14be32c/79717419438.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 5152 bytes
SHA-256: cf7d2502df83cb66b969185c23eb276fc27e0ee6ee8010deca521e4d789b6602
font_01_sfnt_off00012270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12270 10552 bytes
SHA-256: 7c8ad18546cba4f2a8557d45096bfecedfd2e0dff6a06b40630bb9da9ca4b5cb

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