Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa9d6806f8a3f29…

MALICIOUS

PDF

73.1 KB Created: 2021-01-29 14:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c3402d55486d84f8bc98e3ae9a76880f SHA-1: 42ced281b2dadf553dc5e91e0a9a27ee04f41ab7 SHA-256: 9fa9d6806f8a3f298bd75fd7b24ed087281295a564b3eb1578ea4766034823f5
196 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.
  • 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://druttle.ru/wb?keyword=acrylic%20nails%20coffin PDF link annotation
    • https://cdn.sqhk.co/jadepibake/whghcjh/9283743527.pdfIn PDF document text
    • http://copyrighthelpcentral.com/pdf_to_word_editable_versionf3ujd.pdfIn PDF document text
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/f7f61417741.pdfIn PDF document text
    • https://ketadamofexawun.weebly.com/uploads/1/3/5/3/135349072/c48bac.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/gcFhjKi/zajekuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/KijaZgg/nhl_schedule_playoffs_tv.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/rujabepifar/barcode_reader_apk_pro.pdfIn PDF document text
    • http://merapuw.epizy.com/6422178093.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/76624311779.pdfIn PDF document text
    • http://kugofabafomozo.epizy.com/silabus_biologi_sma_k13_revisi_2018.pdfIn PDF document text
    • http://tasaronusofake.rf.gd/xetifugab.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/padubizobiwonubuvoxofeda.pdfIn PDF document text
    • http://wusanobe.rf.gd/42529369821.pdfIn PDF document text
    • http://lojetewope.epizy.com/rejubetelerepoguj.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/36632789076.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_off0000df84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF84 4964 bytes
SHA-256: 6c73f249b40068411961898c056491946582ec59e1152461e62a1d910b9a7735
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 11488 bytes
SHA-256: 722d2b890d13626ae311ae2c168363d9d63db871cf8c67e49da7d9a9a473b92f