Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6b7eada37d21ca…

MALICIOUS

PDF

74.3 KB Created: 2021-04-20 17:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 275bb89eaeefd196bdc0279dabab1aa7 SHA-1: 1a594f5c76ed6541930c8812020801549f14c7b1 SHA-256: df6b7eada37d21ca6263e886e22313f4029b68740ed7ed9167b652b89f4f9726
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, reinforcing the malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall heuristics strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=paper+bag+princess+short+summary PDF link annotation
    • http://gouliwer.online/18_month_language_skillsole4d.pdfIn PDF document text
    • http://getsalle.xyz/tamil_new_movies_freev3o0s.pdfIn PDF document text
    • http://milktree.store/78363212123z72wr.pdfIn PDF document text
    • http://rezotu.xyz/14484996361ott9a.pdfIn PDF document text
    • http://bet-info.ru/voberifakefezonutixisotalfsorn.pdfIn PDF document text
    • http://espaceabonne.com/animal_world_map_vectorrxmos.pdfIn PDF document text
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/wefetagavafitigese.pdfIn PDF document text
    • http://opticsystem.website/zumalz4d02.pdfIn PDF document text
    • https://dinofewujib.weebly.com/uploads/1/3/1/3/131379591/7157360.pdfIn PDF document text
    • http://znakomstva18x.site/87430340786crsv4.pdfIn PDF document text
    • http://soxutabuxupene.22web.org/65459867355.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://zosodevituso.22web.org/99711854811.pdfIn PDF document text
    • http://rovolimobu.iblogger.org/where_is_the_learn_button_on_genie_pro_max.pdfIn PDF document text
    • https://kerizivol.weebly.com/uploads/1/3/4/6/134665291/faxivonawik.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/bdb222bc-7fee-4b40-ba68-e65ebb65eb49/how_to_use_brain_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd008e9d-5b4a-45c9-a6f2-a2b499c0194d/35017567639.pdfIn PDF document text
    • http://doxesuxiweki.epizy.com/accounting_theory_7th_edition_godfrey.pdfIn PDF document text
    • http://wefulipov.epizy.com/acrobat_pro_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfb7832-4670-4ac8-934f-52cececfc8a2/types_of_reading_and_writing_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048d7ca3-c683-4598-8e74-f2ca81ea512b/34729990939.pdfIn PDF document text
    • http://daforewepon.epizy.com/arboriculture_book.pdfIn PDF document text
    • http://veriwag.rf.gd/brocade_switch_cli_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fa702a-79c7-4593-be16-4634134e0dce/att_velocity_2_external_antenna.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_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 5560 bytes
SHA-256: 1d475326fc0a095d87cee8220bf889e0407dd32d90f5e2ae495185e9be671c78
font_01_sfnt_off0000f6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 10840 bytes
SHA-256: caea18f18f20e5ca40d0432790e8411d669a458e931b4c3f2e9cdcfa9a609a6f

Open this report in the interactive analyzer, or submit your own file for analysis.