Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2502b8a8f045ab0…

MALICIOUS

PDF

72.7 KB Created: 2021-02-19 05:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1941c5b335fac7f7065261428624e082 SHA-1: b370d135830504781dec7756bb75697e858f6e05 SHA-256: e2502b8a8f045ab0f18bee5a5c75500eea61281e3b16668364189540b3eca900
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=what+does+crossed+anchors+mean PDF link annotation
    • http://nibumuxadata.66ghz.com/68257077732.pdfIn PDF document text
    • http://sufepivu.22web.org/capital_formation_meaning_in_economics.pdfIn PDF document text
    • https://vemugalibi.weebly.com/uploads/1/3/4/4/134484787/5705688.pdfIn PDF document text
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/pagowuvabawajisab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_602b5dbca0566.pdfIn PDF document text
    • http://emmetrix.net/understanding_regression_analysis_an_introductory_guidebrddx.pdfIn PDF document text
    • http://1xbet-regi.site/self_guided_walking_tour_ho_chi_minhuh3lu.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/heFJiaj/63754758014.pdfIn PDF document text
    • https://cdn.sqhk.co/vetipewalu/jagehak/modern_sofa_sets_in_sri_lanka.pdfIn PDF document text
    • http://magicwoolshop.com/6369818890cy3xf.pdfIn PDF document text
    • http://votujoleb.22web.org/pupezuzigapixafax.pdfIn PDF document text
    • http://uber-global.com/gifebidasipbox6.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/w9mieMu/cat_run_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/cbq3T2F/fopatenudotopokixax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mimitudoxofi.rf.gd/nisavikeb.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_off0000e030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE030 5160 bytes
SHA-256: 894a91b1838499a91c73a9f7d3c4567c168f879b2d73eb7d90a8b6cb6a441b9c
font_01_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 11252 bytes
SHA-256: b7145e77ae00d69c120c6b2b0ea5f2ba45c5f808fa56f7f23a488a7f5b2f9fcf