Malicious PDF — malware analysis report

Static analysis result for SHA-256 462f76a85cd88427…

MALICIOUS

PDF

69.9 KB Created: 2021-03-11 02:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 165fe475d80f5c571dc9fd593c97abae SHA-1: 57b6ebd509ef1719cc6aa4297b7f65c4dd70556c SHA-256: 462f76a85cd88427c3d3853fb61e9a2325c487ecb9d928ab95ebb6787c830395
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, directing users to various disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://kuzutuzo.ru/wix?keyword=sports+heads+football+european+edition+2016 PDF link annotation
    • http://baffer-shop.space/nedinajuisraz.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/xodukevaxapef.pdfIn PDF document text
    • http://discount50it.pro/delta_compound_miter_saw_blade_guardb6dgx.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/kung_fury_2_premiere.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/4536220.pdfIn PDF document text
    • https://wokukowuvewa.weebly.com/uploads/1/3/4/3/134316041/janisuniwaje.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/fdb415ed8f.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/14218273914.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/4524300.pdfIn PDF document text
    • http://help-igcopyright.xyz/10881211186chjce.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/c9acc2f6-32cf-4496-af0f-011593ddaa18/how_to_design_your_own_3d_prints.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_ae77c95275554fcfae825fd63207dd2b.pdf?index=trueIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_fc20eca1ea3747a2babe22cadf0756a0.pdf?index=trueIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_07d2c4640dd94f3e844ed0448ac2fb3a.pdf?index=trueIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_7a8126a8c92441c59b96f33f637e873a.pdf?index=trueIn PDF document text
    • http://vovojoj.atwebpages.com/what_is_irishman_based_on.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_66ce7ec3e19a4f078e1fd252ed0dcbf4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1dbd65b-a6e7-4c49-8a7a-88bd3ac4e518/smith_s_marketplace_bountiful.pdfIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_3fc27dc6778840e0bf9cd222106edc8c.pdf?index=trueIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_90a86780b9cb459bbda9d88e37a02acb.pdf?index=trueIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_19172663977241cd957e865174431941.pdf?index=trueIn PDF document text
    • http://bugenerefajujus.atwebpages.com/25826380592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ecee27-04df-4407-b28d-9b10712ffeb1/naming_mixed_ionic_and_covalent_compounds_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11421e76-944f-447d-9d6c-0a6278287f11/basic_math_worksheets_for_kindergarten.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_ee53bc0c7fed4b7686cb3ab0e20326f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff12529-c431-4c63-9bd6-b3839d5ccc08/hp_10bii_financial_calculator_change_decimal_places.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_off0000d380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD380 5852 bytes
SHA-256: b5f0ef704af3935d088f7d0bd340142feb78e21b4748a65a44b62e0066186bf9
font_01_sfnt_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 9992 bytes
SHA-256: c362c8571991c7b25b971a1b9dfc09c887b1b880ec66fc687442e6e9a4e9a707

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