Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a266db06ea58c4c…

MALICIOUS

PDF

71.6 KB Created: 2021-02-08 17:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 451cbb5e2e062484e8c8f02db2cadf36 SHA-1: 2cfbc261221580c9f882696ba0048003bdae2fa3 SHA-256: 7a266db06ea58c4cad59ff5f2f90273773e300940b82d84e5da89f7d2e652b41
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/aws?utm_term=hanuman+chalisa+telugu+pdf+with+images In PDF document text
    • http://gufutaca1.xyz/wuxijolapadozoresalajobed4ej7o.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/patelaluped.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379851/normal_5fca80b29e4b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470387/normal_5fff19c99588a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_5fe864dd8b479.pdfIn PDF document text
    • http://damomemisogadex.iblogger.org/lawerudisurok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fd660952e5a6.pdfIn PDF document text
    • https://cdn.sqhk.co/vevigagexoxa/0odzNI3/sausage_wars._io_mod_apk.pdfIn PDF document text
    • https://surugodinatuv.weebly.com/uploads/1/3/4/8/134861851/4000395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://verepuremi.rf.gd/dragonfable_stats_guide_for_rogue.pdfIn PDF document text
    • http://xizokokov.epizy.com/jigumepafumemoreveg.pdfIn PDF document text
    • http://fonobufusig.rf.gd/fab_center_android.pdfIn PDF document text
    • http://vonefufekoja.rf.gd/avast_antivirus_lifetime_license_key_free.pdfIn PDF document text
    • http://kibowetesuve.rf.gd/notiwovogurelava.pdfIn PDF document text
    • http://nenidexixod.epizy.com/lich_king_hearthstone_hunter_guide.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_off0000d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 5524 bytes
SHA-256: 5825e733c54d78447385ac73add3a415bf7f4ea57f7bb6b29088d9078d81b1a6
font_01_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 11568 bytes
SHA-256: b8a22fbc6a5df93ebca40e48f5520895244a780877074925bd228c1a787d5af7