Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0e8e7749be097a…

MALICIOUS

PDF

107.0 KB Created: 2021-02-17 13:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: acdfb408c875253781c55cca8edec8b5 SHA-1: 70e02646a3bc0f443ec461d612617e9b94ac4dca SHA-256: 2f0e8e7749be097a157dc938749f6a50aa6be1b0fe327c49f158e3087fd3d1b3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm designed to direct users to potentially malicious websites. ClamAV and ML heuristics confirm the malicious nature of the file, classifying it as a phishing or trojan threat. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=polk+audio+magnifi+soundbar+troubleshooting PDF link annotation
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/kimidozotubenutisa.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/1gfihji/problemi_secure_settings.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/bUdUljc/44801358197.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/pirawegi.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/kumawilakarefugeluja.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/iab6x1S/calories_in_birthday_cake_with_whipped_icing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387565/normal_5fca5fcb8e852.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/Hiigdtf/best_hard_rock_songs_of_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/hc7ick7/poblano_pepper_substitute.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/jukoxisojow/us_portal_docket_sheets_pa.pdfIn PDF document text
    • http://mukesul.epizy.com/74443610015.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/77376522119.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/comune_di_campoformido_orari_uffici.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/cashew_chicken_sheet_pan_dinner.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/core_mathematics_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/jedaparuveno.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_off00016583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16583 5524 bytes
SHA-256: 8ea41ef639601a4a24d0b0d6964be31452a876ee7f783ab6156d7fdae835f047
font_01_sfnt_off00017828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17828 11768 bytes
SHA-256: eba2cf5f3d9af3fdeb7daa29b1fd1f6d4459a72b723ee6c0ea3e104f6ebcdd2f

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