Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d28a7f02b2b053b…

MALICIOUS

PDF

72.6 KB Created: 2021-03-01 02:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 571203cea8b1193529c9b1cae8c0ef53 SHA-1: 637ba5a243e5e5a26dee77f8b92c365a39b06c82 SHA-256: 4d28a7f02b2b053b1a63e1e0a64ab1a431b8fb3efa16b4e7e0402b05bb27cf3b
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://soxebez.ru/award?keyword=yo+amo+a+paquita+gallego+capitulo+110 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428069/normal_5fe734b82bc47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444630/normal_5fd8768e888e1.pdfIn PDF document text
    • http://adanakebap.org/reversible_sectional_with_storage_ottomangcmav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_6023e37a67989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_603056d454d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_602e7d747759e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_60078ccb97c04.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/ibJhilR/gobematozemolavagufe.pdfIn PDF document text
    • http://bigowet.xyz/how_can_schools_reduce_climate_changefsk3v.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/hc48MxP/fallout_shelter_wiki_radio_room.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_60282e5ab0ccf.pdfIn PDF document text
    • http://liginirudusupob.22web.org/how_to_clean_keurig_2.0_k400.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/fSqPCic/24456531506.pdfIn PDF document text
    • http://poopo.ru/delufamurenotodawxap5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sarozaxag.epizy.com/simple_curriculum_vitae_template_doc.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_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 5260 bytes
SHA-256: 3e52c75a7b583f2d44fad2fa45dd6cc0a5220868ecefe2998d82c9777df0d29b
font_01_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 10712 bytes
SHA-256: b507e8d23e1467c8ad22318f0b617d7c23aef7e3ae1df3685cd909c8db9e413c