Malicious PDF — malware analysis report

Static analysis result for SHA-256 4680e6e8e6660aaf…

MALICIOUS

PDF

76.2 KB Created: 2021-03-07 10:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 83cc1b9a86b064ea8ca91f1155863782 SHA-1: bbe0c75528746efb51b60337ccf117f85b655286 SHA-256: 4680e6e8e6660aaf1d7231ecb9be6c757126a26237f79fd8283c0f419ef414e4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified as 'https://pelibifir.ru/strik?utm_term=jump+attack+workout+results'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=jump+attack+workout+results PDF link annotation
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/xawaposopezin-fivulusod.pdfIn PDF document text
    • https://kilobabax.weebly.com/uploads/1/3/1/8/131856311/5839883.pdfIn PDF document text
    • http://hookup756.fun/zojirushi_ns-zcc10_5.5_cup_neuro_fuzzy_rice_cooker_and_warmer_in_premium_whitenr7tl.pdfIn PDF document text
    • http://madamzero.com/leggett_and_platt_adjustable_bed_frame_50_series8dejy.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/3295674.pdfIn PDF document text
    • http://makeyourself.xyz/zasimulekopopenepaninwail.pdfIn PDF document text
    • https://xotoxagat.weebly.com/uploads/1/3/4/7/134753993/zikoritefe.pdfIn PDF document text
    • http://remont-pc.website/viwoperobux0y0z.pdfIn PDF document text
    • http://obmenkalnr.online/pofaxibafujuwezamukje9t2.pdfIn PDF document text
    • http://samyog.ru/31049647832bi5mk.pdfIn PDF document text
    • http://instapodarok365.site/word_connect_answers_4882s9lc.pdfIn PDF document text
    • http://pavezala.iblogger.org/bus_from_san_francisco_airport_to_santa_rosa_california.pdfIn PDF document text
    • https://wisemidotoveto.weebly.com/uploads/1/3/4/3/134349295/261667b.pdfIn PDF document text
    • http://smartbright.club/11562412706ne7un.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/899cafaffa55.pdfIn PDF document text
    • http://vafenofu.22web.org/46462302189.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/sugosubexez/69333073713.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/microsoft_excel_spreadsheet_extension.pdfIn PDF document text
    • http://desakoda.rf.gd/super_champ_x2_headphones.pdfIn PDF document text
    • http://wetowotupime.rf.gd/sasawirefavewavokun.pdfIn PDF document text
    • http://filivuso.rf.gd/rofur.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/define_software_in_information_technology.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_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 5224 bytes
SHA-256: 144efbe6ef9913453c304a87117beeb2078c57b56870dccb095db48fbd755ee0
font_01_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 11652 bytes
SHA-256: 47ee051ccc16537cde2acf2d991a570660589843943e9e8b9d60cab469a6ee97

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