Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50782cfeddaeea0…

MALICIOUS

PDF

62.6 KB Created: 2021-01-21 11:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: effced8c95bdf48fa4efe3ff90766eb6 SHA-1: 5730e07cdc081ec4b70e2e55da6e0a6984a2352f SHA-256: e50782cfeddaeea016e6b9d8b5ab0e8dbb9d0e19b70986e92fd6ad09a34ac4fa
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wb?keyword=sandwich%20maker%203%20in%201 PDF link annotation
    • https://site-1178035.mozfiles.com/files/1178035/best_online_soccer_store_usa.pdfIn PDF document text
    • https://site-1175626.mozfiles.com/files/1175626/mini_golf_club_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/jfetjhT/zurizepekawowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5fb6e6750fc88.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/JgiNaja/3531914761.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hFgfiiU/niborapezivar.pdfIn PDF document text
    • https://site-1175681.mozfiles.com/files/1175681/the_tribez_e_castlez_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/4ic8L5C/66048697475.pdfIn PDF document text
    • https://site-1083678.mozfiles.com/files/1083678/project_report_on_vermicompost_unit.pdfIn PDF document text
    • https://site-1192097.mozfiles.com/files/1192097/nikaxomisasu.pdfIn PDF document text
    • https://site-1166601.mozfiles.com/files/1166601/jovezax.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/4486877.pdfIn PDF document text
    • https://site-1166625.mozfiles.com/files/1166625/17062877258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legipalofi/minatuga.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/old_ebay_app_for_iphone.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_off0000b8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DE 5444 bytes
SHA-256: 33a8a1c1f83c5e3868d8521290fdc5d9d9f8af44bb532b6d263577e1e0437ad9
font_01_sfnt_off0000cb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4F 10072 bytes
SHA-256: 64de46a7cdcf94eed08bcadc33dee35f990474263b6ad19665574bee97b409d5