Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f189f56f8c34020…

MALICIOUS

PDF

77.9 KB Created: 2021-04-26 22:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 71ab7eb162285523cd46270d58f93b8a SHA-1: 2897d5ed07999249478b8913fd0b1d837499b9b3 SHA-256: 6f189f56f8c34020bb4b79d030643088fd3aca9ef69b2bc9bcde8e960b05acf1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=can+you+play+wii+u+gamepad+without+the+console PDF link annotation
    • http://winoxolupuvil.getenjoyment.net/criminal_law_noun.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/65454956220.pdfIn PDF document text
    • http://gozipoxeget.iblogger.org/dell_latitude_e5470_bluetooth_driver.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/alpert_valvular_heart_disease_free_download.pdfIn PDF document text
    • http://jelojutu.sportsontheweb.net/critical_theory_today_a_user_friendly_guide_3rd_edition.pdfIn PDF document text
    • http://dedekuwetom.iblogger.org/47247239362.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rulixazani.rf.gd/4072280989.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/maths_puzzles_for_class_11_with_answers.pdfIn PDF document text
    • http://roloverat.rf.gd/gusabivujo.pdfIn PDF document text
    • http://biwosagamivi.myartsonline.com/bitcoin_investment_plan.pdfIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_9fb934a87c67487496039a9c47aacfef.pdf?index=trueIn PDF document text
    • http://remavolef.epizy.com/roba_como_un_artista_austin_kleon_gratis.pdfIn PDF document text
    • http://diverozisutujew.epizy.com/80709356562.pdfIn PDF document text
    • http://juwejaju.rf.gd/26981160065.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/dotub.pdfIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_175e23e4785d4536abcea31d142cf065.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/ventless_washer_dryer_combo_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fd519a-f77b-4912-9c18-533e1fd8c8dc/how_to_do_a_tire_flip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c92d50-7338-4c19-a712-f782a9111c11/alfred_basic_guitar_method_book_3.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_2b833b85d88e4775a92ac5e29dc6893b.pdf?index=trueIn PDF document text
    • http://fozabenisos.epizy.com/boolean_algebra_practice_problems_solutions.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_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 5492 bytes
SHA-256: 9c8ff42ce392323c4b3d9875248e263a21f283221356ea0ff6b0452ef6e1d34e
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 10696 bytes
SHA-256: 4676a8d57fc3d7975a1b78d26e5380090f01b3d8a501b6999722d9511cfcb68a

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