Malicious PDF — malware analysis report

Static analysis result for SHA-256 840cb6bde8235465…

MALICIOUS

PDF

66.1 KB Created: 2021-03-03 08:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3d3051bb16b0cffea7121c8ec4f0e028 SHA-1: e1d69e1e3f34b88a9fcc6b9dbd7b1f49cf85145b SHA-256: 840cb6bde82354650d005fcd19bb39cd968861866bde582ab9d2be8288f10364
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/wix?keyword=cherry+pickers+guide+quarters In PDF document text
    • http://storeplus.pro/bahubali_songs_in_telugu_320_kbpsc7ote.pdfIn PDF document text
    • https://cdn.sqhk.co/biwopeka/byibOhh/36252578690.pdfIn PDF document text
    • http://letxxnx.org/spanish_academy_soccer_coachinggkrgf.pdfIn PDF document text
    • http://tasefuvakol.22web.org/linked_list_using_template_c_program.pdfIn PDF document text
    • http://trycabinets.xyz/corbettmaths_composite_functions_inverse_functions_answersi8nex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489596/normal_5ffdc42234b0e.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/cjcsjdk/31962021840.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/MgfOgcD/vietnam_war_agent_orange_primary_sources.pdfIn PDF document text
    • http://madewithsunshine.com/wogidemtcjlt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_603e595fda7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_6031db9b00919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421788/normal_600961b9dd67a.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/gulapore/benessere_digitale_google_apk.pdfIn PDF document text
    • http://sunemixawuvija.epizy.com/peer_pressure_on_academic_performance_articles.pdfIn PDF document text
    • http://dazimosanugep.epizy.com/dejugapupoguxuvij.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/51508708540.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/fewovabove.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_off0000c6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B3 5500 bytes
SHA-256: 08b37838cb510f71b690b220f1a1b8bb0731a1b3adb52b2ec69c5d3d348fa141
font_01_sfnt_off0000d95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95C 9976 bytes
SHA-256: 7f4f4993879ce1e8684227759d2da3fa52c57ecbbdd8f9349fa7ea8af718249b