Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab57356b933524e…

MALICIOUS

PDF

64.0 KB Created: 2020-12-21 03:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c98248d89c135315d11ce4dce2a2e61b SHA-1: be2dc68fb58e4b891a165f284b45c32fccf36d02 SHA-256: bab57356b933524ecb4280869771efec559cfbeae424abfad3764ca80aa86f05
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 0.9998

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://traffking.ru/123?utm_term=hvac+licensing+study+guide+second+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489722/normal_5fd205a33b57a.pdfIn PDF document text
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/pipupuxaxefafun.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/3179128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2fe06403f5353fda36cb8/t/5fc77b4348d5672cfb40add0/1606908740155/5180882606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b574158-7ade-4c0a-92a8-c0819e16c40a/uwb_major_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce04f10356d927d7eb6228/t/5fd0c6bccb6bfe602c5854a5/1607517885072/61415695387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c05a9c-7cf5-4b00-b122-e55b881ccf3f/kpss_paragraf_soru_bankas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab9d321-221a-45f2-a544-503ba8d3ca99/zenavexinuzopama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ad90ac-adab-4250-8c07-deaa5b8fcd4b/rilobefalodisixuzoxaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0508e7-cc13-49a4-91f9-4a2ea6877ae4/introduction_to_flight_john_anderson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9cb5d59-d98f-41eb-b218-ba87f33daf4d/blank_copic_color_chart_hex.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_off0000beee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEE 5136 bytes
SHA-256: 113a2b17ee5469857513bec44359221b49ea5749ebeb59dea1569c278409f46e
font_01_sfnt_off0000d081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD081 10072 bytes
SHA-256: e8bb5d7aed6fefb9b1d262b0fb3315738401827241971c9c8cb41844b12c1c19

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