Malicious PDF — malware analysis report

Static analysis result for SHA-256 342f5b3e4fe281d3…

MALICIOUS

PDF

72.5 KB Created: 2021-01-29 07:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 18f4b6d14a4130d3d0a464266d4e4afb SHA-1: 785f78711d1de874f2999bcea7cf60841deffa62 SHA-256: 342f5b3e4fe281d3fa0f147958f0b79341fcb6d862d0eaf6b73277dfe0521d16
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=code%20review%20guidelines%20for%20humans In PDF document text
    • http://teenagetutor.online/3637078522z2a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_600b3a93d8de2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5ffb9ff13ef65.pdfIn PDF document text
    • http://korecos.ru/wavadakaravetera64kyx.pdfIn PDF document text
    • http://tesar-krd.ru/necrologie_republicain_lorrain_thionzmdbb.pdfIn PDF document text
    • http://pinerapidsrr.com/necronomicon_hr_giger50fvk.pdfIn PDF document text
    • http://medyahanem.com/butuwezawuxazee6hzs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gawekavadave.epizy.com/centrelink_disability_support_pension_medical_report_form.pdfIn PDF document text
    • http://pasazaxara.rf.gd/papomuwatarajota.pdfIn PDF document text
    • http://luwawabegopit.rf.gd/43428530555.pdfIn PDF document text
    • http://fotopokidag.epizy.com/autocad_print_to_with_searchable_text.pdfIn PDF document text
    • http://fodabobaxuti.epizy.com/capitulo_4a_realidades_1_answers.pdfIn PDF document text
    • http://lojiwifi.epizy.com/16569593352.pdfIn PDF document text
    • http://favukimasinete.rf.gd/alan_walker_dj_songs.pdfIn PDF document text
    • http://gujusama.rf.gd/apset_model_papers.pdfIn PDF document text
    • http://forawoxo.epizy.com/sikanatoturafemajifata.pdfIn PDF document text
    • http://bupomejov.epizy.com/answers_in_genesis_the_nature_of_science.pdfIn PDF document text
    • http://nasujaguza.epizy.com/sirewuzalobu.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_off0000ddf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF3 5380 bytes
SHA-256: 494875b3bf45c24f8e165d914b5790747b093a6a8f60550bb18e858f4cdaf763
font_01_sfnt_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 10816 bytes
SHA-256: 2239ca988d85f88168d4827f14a71371b26322141b3d7658a874124306af2763