Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0fa820986f04da…

MALICIOUS

PDF

65.9 KB Created: 2021-01-23 17:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c187b363b4e3f9b9112bb7951ed6844a SHA-1: 49e1403fd9112068d1cd898f6292eea90581eb15 SHA-256: 4b0fa820986f04dae7eae62e41b935bf7386ba2b2e93fa9aa387a9eedcd4f9c1
126 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
  • 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://leonvi.ru/aws?utm_term=implicit+instantiation+of+undefined+template PDF link annotation
    • https://site-1167954.mozfiles.com/files/1167954/witcher_2_crafting_runes.pdfIn PDF document text
    • https://site-1168265.mozfiles.com/files/1168265/balance_sheet_equation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fd68bbcbd97b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5ff8750d515e4.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/BhaChht/centris_federal_credit_union_routing_number_ne.pdfIn PDF document text
    • https://cdn.sqhk.co/bawijodol/pnWhgVU/electricity_meter_box_price_in_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/tWiibJN/border_services_officer_job_posting.pdfIn PDF document text
    • https://site-1173675.mozfiles.com/files/1173675/quarterly_business_review_ppt_template.pdfIn PDF document text
    • https://site-1172364.mozfiles.com/files/1172364/xbox_one_controller_driver_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/gdCNigF/puguwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451229/normal_5fe7a081173a7.pdfIn PDF document text
    • https://site-1166728.mozfiles.com/files/1166728/like_father_like_son_mechanic_tattoo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5fcebefdedcaa.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/the_crowd_gustave_le_bon.pdfIn PDF document text
    • https://site-1197000.mozfiles.com/files/1197000/ala_hazrat_image.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CA 5144 bytes
SHA-256: 3fae591f3b633cb5084b627465b032f6259f7a3cf402524b64494d6b3b3355a1
font_01_sfnt_off0000d439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 11160 bytes
SHA-256: 84b7006e912ac0ce310c438a798845f70995b0b10e1e657b36de23fc452c0af2