Malicious PDF — malware analysis report

Static analysis result for SHA-256 344a34b323d09084…

MALICIOUS

PDF

73.7 KB Created: 2021-05-07 14:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b95718383cc4a0a885d328bd472eaf3e SHA-1: 74b44d82fd414d90a8b51ab704b685a82796df26 SHA-256: 344a34b323d090849ebfddd6aa5c7e2181866c58be72cb7a646fdf4a07937d6f
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing malware or conducting phishing attacks. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=grid+systems+in+graphic+design+amazon PDF link annotation
    • http://fisujerekuvij.getenjoyment.net/chameleon_care_guide.pdfIn PDF document text
    • http://gewebufokorilu.iblogger.org/save_the_cat_novel_beat_sheet.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/current_affairs_2020_in_english_with_answers_download.pdfIn PDF document text
    • http://kumokopilomeme.22web.org/zikejubogemejozasidazufuf.pdfIn PDF document text
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/1611751.pdfIn PDF document text
    • http://xuratalusat.22web.org/folumisowosanalalixe.pdfIn PDF document text
    • https://pusuxefemaj.weebly.com/uploads/1/3/4/1/134108889/5496790.pdfIn PDF document text
    • https://wewofubajibopa.weebly.com/uploads/1/3/1/3/131381003/d755e9c874c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lidudoxodirabi.rf.gd/how_to_make_an_18_inch_dollhouse_out_of_cardboard.pdfIn PDF document text
    • http://melamefi.rf.gd/anti_lock_braking_system_seminar_report.pdfIn PDF document text
    • http://javewexo.epizy.com/oxford_discover_6_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/digital_economy_act_2017_data_sharing.pdfIn PDF document text
    • http://wizuzipureja.epizy.com/the_boy_who_harnessed_the_wind_summary_chapter_7.pdfIn PDF document text
    • http://soxekig.epizy.com/breve_gramatica_italiana.pdfIn PDF document text
    • http://lekegavavab.epizy.com/introduction_to_organizational_behavior_an_evidence-based_approach.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/guviwawafu.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/32885992066.pdfIn PDF document text
    • http://zosuvupetod.epizy.com/digestion_of_fats.pdfIn PDF document text
    • http://keximatefabuzi.rf.gd/5887854852.pdfIn PDF document text
    • http://robegataparusur.epizy.com/do_crits_always_hit_5e.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_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5636 bytes
SHA-256: 514f26514fb52f41727854fe544aebb17c14e4eb5d64763701dc03b01664da59
font_01_sfnt_off0000f5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A8 10520 bytes
SHA-256: e2e98402203c8081e4ac0da409dfd0b863e8c3c15debbbbbba6f760362d86c4e

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