Malicious PDF — malware analysis report

Static analysis result for SHA-256 215989f45bfa1602…

MALICIOUS

PDF

78.2 KB Created: 2021-04-30 19:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cadc657d9fdb3c6da3a4662a6d6e0e2b SHA-1: 8b370c3b0665ec28bdb0336bf474c03c2787584d SHA-256: 215989f45bfa1602a78d112c25f234bb22e68ba84c57b014bfa3b7c354a7c757
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://dafemum.ru/strik?utm_term=how+much+will+cyberpunk+2077+cost+on+black+friday PDF link annotation
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/sikulagutamu.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://kushtanash.ru/831996318328bn22.pdfIn PDF document text
    • http://erogancolumbia.site/embroidery_design_software_for_androidia530.pdfIn PDF document text
    • http://asta-stroy.ru/gerald_corey_counseling_and_psychotherapyd732l.pdfIn PDF document text
    • https://dezilupogebog.weebly.com/uploads/1/3/4/1/134109094/sivegolare-fazujopab-muluwopijo.pdfIn PDF document text
    • http://ilkertr.shop/string_format_python_fv78b4.pdfIn PDF document text
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/1b32a9bfb8.pdfIn PDF document text
    • https://bokonuso.weebly.com/uploads/1/3/4/6/134604328/kozipari_gaxagedewifita_jarajafilaj_zawidofaw.pdfIn PDF document text
    • http://thehensleys.org/490693857295omds.pdfIn PDF document text
    • http://timelessdecorum.com/raikes_bears_price_guide7vq90.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/jitimesolagun/95312643260.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/list_of_all_amino_acids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce37c5e-dd66-4e94-b4dd-26891aab6ffc/27571330070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f35753d-50be-4243-a8d7-9d3fff5d8cfa/79278717262.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/42640635712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6942362-9542-479f-acfb-dc70e1d99766/mavogabupugiwejife.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/taurus_pt111_g2_sight_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a863bb23-7112-462a-8fc3-6ead1239bb47/3005583019.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/98021290935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bc80fb-8bc5-4d1b-9782-5f657e6940f4/fifty_shades_darker_full_movie_download_in_hindi_worldfree4u.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_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 6108 bytes
SHA-256: 16b5df04198cff70b8f7166231995e689d21dc3107776927df7b1acd9ebeef9f
font_01_sfnt_off00010296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10296 11328 bytes
SHA-256: 32f207520f1deb6d2daef1385cf53559011dc8c4ce825c2ccb150303eb7f7b4d

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