Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b4f86308767bf0…

MALICIOUS

PDF

74.3 KB Created: 2021-02-12 18:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e17fedc6eb5d6a436b86a5316330139e SHA-1: 05d113184bb7f6a3ab61d57c7b1a3a98b5b1a791 SHA-256: 85b4f86308767bf052269340231f6c6ab658cdd4ac5f527b907abf06f10fe36d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/123?utm_term=zeus+drawing+colored PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466398/normal_6009797d2ad2e.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/fIhctiU/jetikolazojasukimunoluko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484997/normal_5fcc1ef54e24c.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/1BPl220/possible_to_get_in_shape_while_pregnant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5fcfaf11c36ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_601bf95d9a420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470387/normal_5fe001dcc392c.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/ibxgiQi/adventure_quest_dragonspine.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/pomaxawe-supinuwiwi-gunapu-sinupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_600fee3f34bff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5fdab5cd8465d.pdfIn PDF document text
    • https://cdn.sqhk.co/gananotez/5HbV7KT/oscar_health_phoenix_arizona.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/hjeImjb/74018898485.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/kujapomib/pojufanemogek.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/impossible_year_cello_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/factory_reset_android_7.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/paediatric_bristol_stool_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/consumer_reporting_agency_us.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_off0000e80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 5156 bytes
SHA-256: 5a13921f3a963091ee8ca99e72d2a3f974463e53876d48c649c6eed6dd5c1d9b
font_01_sfnt_off0000f9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BC 10080 bytes
SHA-256: 4ffd186c0ba7bc55a10e28e6062332f82d599f6bdcf2b6d577dd5fcb08799167