Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfe75c89f4323dd…

MALICIOUS

PDF

71.9 KB Created: 2021-02-15 16:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b87e4e961af2e91e2746371c8d52478e SHA-1: 53ec0361577a47e87f4670fb9b63f38cd1c6a665 SHA-256: 8cfe75c89f4323dd9e03a9cd3d16d07294bf114e83cc35a710b235ed9706624e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=pre+algebra+proportions+worksheet PDF link annotation
    • https://defaxudenuged.weebly.com/uploads/1/3/5/2/135293647/widev.pdfIn PDF document text
    • https://feropozu.weebly.com/uploads/1/3/1/4/131454035/wobufadezeve.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/ea3a6ec95.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/187059.pdfIn PDF document text
    • http://wabuxon.iblogger.org/shiloh_by_phyllis_reynolds_naylor_sparknotes.pdfIn PDF document text
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/kanedilejirap.pdfIn PDF document text
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/948cc9f8.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/7847777.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/gupawupigawono/carrier_air_cooled_chillers_manual_30xa.pdfIn PDF document text
    • http://porumujowupof.epizy.com/happy_new_year_sheet_music.pdfIn PDF document text
    • http://winutuforugen.rf.gd/bepasabutakugibigo.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/48076191454.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/latipofewa.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/when_play_store_shows_pending.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/sivubikikokudoxiwewi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/xugukotudefirabudoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/40291153123.pdfIn PDF document text
    • http://puzegekizizovin.epizy.com/cute_dolls_pictures_free.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_off0000dbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 5380 bytes
SHA-256: 44285e97a0d6937dbd4d100fa1f2b135f9378536a363436f796e40007de5de1d
font_01_sfnt_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 10080 bytes
SHA-256: c14eda442e226f3e07e7d14fde5f44ed87eb293b984000a8ae0b334c68d634c5