Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6cc74ecb913e799…

MALICIOUS

PDF

72.1 KB Created: 2021-02-02 09:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 43f30821d8e05b81379ba82f40c7a8fd SHA-1: 081cc289e5bacf1ab7fccc4a360b53f45fb3dc9b SHA-256: d6cc74ecb913e79946368e8cc01dad3925c5a8f1545828c5a7d3d6214e5c6ad0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://maypoin.ru/aws?utm_term=lowercase+a+worksheet+free', suggests a lure to a website. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/aws?utm_term=lowercase+a+worksheet+free PDF link annotation
    • https://busenijerebu.weebly.com/uploads/1/3/2/6/132695513/gejir.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/giigw3V/12384919387.pdfIn PDF document text
    • https://medimigo.weebly.com/uploads/1/3/4/8/134864966/gusalebededaxetu.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/gfuigje/exoskeleton_definition_medical.pdfIn PDF document text
    • https://ratofesut.weebly.com/uploads/1/3/5/3/135304008/505f71.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/wufujudisu/make_text_bold_in_string_android.pdfIn PDF document text
    • http://jekidosokun.epizy.com/94584601939.pdfIn PDF document text
    • http://fozabenisos.epizy.com/reporter_gene_assay.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/import_data_from_csv_to_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/wigedapotu.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/makifimakodigubatukuw.pdfIn PDF document text
    • http://zuvemodu.rf.gd/gekuroxapi.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/bal_krishna_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/pojepabovajoporat.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/beaver_builder_templates.pdfIn PDF document text
    • http://diwukimip.epizy.com/partnership_agreement_forms_free.pdfIn PDF document text
    • http://jutademopewe.epizy.com/hexaware_aptitude_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/85364501688.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/ikea_australia_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/whatsapp_cartoon_video_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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 5036 bytes
SHA-256: 1853ccfbbd670f655d7fe3b7f6a95ae513925c83c8de0b5698102b076c153fc4
font_01_sfnt_off0000efbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 10364 bytes
SHA-256: fd88822fda2bca703836f4a2a620622a0f93544bb9c159de91e8fba5b51bb23b

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