Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d1199cf3dd2299…

MALICIOUS

PDF

71.7 KB Created: 2021-02-27 19:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 26ed905f1b62fe2a5c4d35eb9c589e07 SHA-1: d46b68737b5d66c53c3c62c8fd97d535091b45f1 SHA-256: e1d1199cf3dd2299f29b7b6c36eb2816b00de8637cba5f659823553be023f0f8
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports this, suggesting a lure to trick users into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/aws?utm_term=how+to+join+webinar+in+google+meet PDF link annotation
    • http://rebelliona.online/rukupegagesidunngkv0.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/nike_resistance_band_training_exercises.pdfIn PDF document text
    • https://gubulugovidenu.weebly.com/uploads/1/3/1/4/131406252/dapaxotuxipu.pdfIn PDF document text
    • http://jilunagobag.22web.org/bajasomimarapereduwogeme.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/95889909918.pdfIn PDF document text
    • http://monoga.space/4347267838555962.pdfIn PDF document text
    • http://lg-copyrightforms.com/49056609456etvjy.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/the_human_animal_desmond_morris_quotes.pdfIn PDF document text
    • http://allrecipes.pro/beronopavikorovovamfxk4a.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/thermo_king_reefer_engine_for_sale.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/why_is_my_dishwasher_not_fully_draining.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/4429444.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/cuisinart_coffee_maker_grinder_instruction_manual.pdfIn PDF document text
    • http://kibiwoki.iblogger.org/dirujarapawetosorit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabejanaboz.atwebpages.com/23005522145.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/high_school_biology_macromolecules_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/54388755360.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/55546104962.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/python_compare_dictionary_values_to_string.pdfIn PDF document text
    • http://nixewawomito.epizy.com/gumomujunifanonijafike.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/how_to_get_my_brother_printer_back_online_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/disney_story_central_podcast.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_off0000dcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBB 5096 bytes
SHA-256: 09dad47016b142baeb9fc111aba6bfe1415a7866acc41186dba44cbee77ba3e0
font_01_sfnt_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 10400 bytes
SHA-256: a9662c06de0990bbf02dc8654fede5601268a1938698d8c7bbdbfe0d6c25d1a9

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