Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2765d0471fbcc8…

MALICIOUS

PDF

78.7 KB Created: 2021-04-24 11:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cbbb823b4bcbaa910042584b0309542 SHA-1: 632e25a7cf9a602595c635a4f5f0531400265fe2 SHA-256: bd2765d0471fbcc8d0922d6de401c195e8c6f77bf5530d925debc8aaf775c2e2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. One prominent URL, 'https://lozipotod.ru/strik?utm_term=tips+to+pass+aswb+clinical+exam', is directly associated with the document's content, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=tips+to+pass+aswb+clinical+exam
    • https://kurinasuvofete.weebly.com/uploads/1/3/5/3/135334761/berapofan_pevisar_fawiput.pdf
    • https://zegaxazidunuxe.weebly.com/uploads/1/3/4/7/134746987/lawijuvoxox.pdf
    • https://pananufizusa.weebly.com/uploads/1/3/4/4/134445813/tibaw-fererurewagot.pdf
    • https://ragivigelogupow.weebly.com/uploads/1/3/4/5/134525503/roxelapedalika-kulazi-pewixil.pdf
    • https://sajanemi.weebly.com/uploads/1/3/4/7/134750514/4112602.pdf
    • http://therarbooks.com/tabloid_vs_broadsheet_essaybtjgn.pdf
    • http://semengergel.ru/308723188775k3st.pdf
    • http://wuvufitomisag.22web.org/harvard_referencing_generator.pdf
    • https://wiromokuxuzub.weebly.com/uploads/1/3/5/2/135298753/bajazewadam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fixobijuruloluk.rf.gd/29224235479.pdf
    • https://s3.amazonaws.com/bisute/mechanical_engineering_company_profile.pdf
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_9e7ad9ed6a8d4435a51aa7e1b383a1c1.pdf?index=true
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_36017d21dc9548acab1ebc07d1cc8664.pdf?index=true
    • https://s3.amazonaws.com/kawotexulozax/journey_to_the_center_of_the_earth_2008_full_movie_in_hindi_download.pdf
    • https://s3.amazonaws.com/sorogamat/13601433842.pdf
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_4c0b056c724a45db94bdc9c767c8a76c.pdf?index=true
    • http://jojofolarimema.epizy.com/how_do_i_turn_off_the_red_light_on_my_samsung_tv.pdf
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_c418df221a254714a6d5d0fb11e3a895.pdf?index=true
    • https://s3.amazonaws.com/limewub/crib_flat_sheet_size.pdf
    • http://rorodev.rf.gd/49909533266.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/88756157759.pdf
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_a2ec73e642494d87ba447da17efe4fb7.pdf?index=true
    • http://bogibil.rf.gd/18429063455.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f773.bin
66d5c46b1c04912ee942e6270cc54991df32bbe66c07cc64afae2e310ced87bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 5232 bytes
font_01_sfnt_off00010942.bin
1d3577971a238ab8ad295bf981ca8f9f80fdf28ae9b07a980ec78af8a376b1ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 10716 bytes

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