Malicious PDF — malware analysis report

Static analysis result for SHA-256 e251ebc3c72eda6a…

MALICIOUS

PDF

72.3 KB Created: 2021-01-24 09:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1fe36a96572c7c1111ff666220864c58 SHA-1: ad5da3ccb828f2c1b3d77cc4bd2cce2e8c702b2b SHA-256: e251ebc3c72eda6a585b5fca816c4c86161218c3b4cdb70198d24e90c57f126f
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://trafffi.ru/aws?utm_term=poultry+biosecurity+plan+template PDF link annotation
    • https://jatekokem.weebly.com/uploads/1/3/2/8/132814322/pilegiresekake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_5fd3365415054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_60039717615af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5ff174ede22e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xizokokov.epizy.com/payback_period_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/46576289041.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/limiting_reactants_worksheet_answer_key.pdfIn PDF document text
    • http://wuvasof.epizy.com/call_firewall_free.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/roruxurusamuvelonusogoxo.pdfIn PDF document text
    • http://lorabedujeweb.epizy.com/2008_cadillac_escalade_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bounce_fabric_softener_sheets_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/tiwebujotemetowaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/brothers_in_arms_3_apk_gameplay.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/plate_tectonics_activity_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/catanzaro_informa_ultima_ora.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_off0000df1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1F 5320 bytes
SHA-256: 7ca96cd5c0419a2c409627de60818c16db4e25eba1c96b2dda3b9a5a75df432a
font_01_sfnt_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 10364 bytes
SHA-256: b9fb8a6da7e940156cb0828c2cc8a2f68841e60601139a9b606cb087b9faa933