Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c886961557abfdb…

MALICIOUS

PDF

66.6 KB Created: 2021-03-03 16:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1843332e44c8c63aa4e07767967e8b40 SHA-1: acca6352601e961965fec403ca863c6c52b54a29 SHA-256: 2c886961557abfdb5a659c1c970a25448e94aad34aa1ee16207636ee65b979d5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=dna+and+chromosomes+worksheet PDF link annotation
    • https://cdn.sqhk.co/putomikoluku/jeogggj/79838066441.pdfIn PDF document text
    • http://nozuzatu.22web.org/maxon_cinema_4d_r20.pdfIn PDF document text
    • http://wesadozazizubus.iblogger.org/1229357975.pdfIn PDF document text
    • https://tekebuzegox.weebly.com/uploads/1/3/0/8/130814382/7877523.pdfIn PDF document text
    • http://xadutewopitap.22web.org/fractions_practice_with_answers.pdfIn PDF document text
    • http://sidikapefujuxe.22web.org/altimetrik_annual_report.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/kovezux/tomopufuko.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/17191304911.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/gw2_guide_elementalist.pdfIn PDF document text
    • http://dikumetuvo.epizy.com/alpine_cde-133bt_not_pairing_with_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/38981752314.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/xapozebidagudegorimarod.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/oh_lord_how_excellent_sheet_music.pdfIn PDF document text
    • http://xenemusexo.epizy.com/business_impact_analysis_report_example.pdfIn PDF document text
    • http://xonumubik.rf.gd/xotoxotavugosabopokotul.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_off0000cb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB56 5300 bytes
SHA-256: 1a2c022edcd8b1620ac7932074d25be7093df124b96c1b800a33324cb1d4a9fa
font_01_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 9360 bytes
SHA-256: 77d4cab33ff65ba8828e24b8edab9230951ee41a4eaaf0047e911c6a4b56a56b