Malicious PDF — malware analysis report

Static analysis result for SHA-256 353481060a90a174…

MALICIOUS

PDF

61.4 KB Created: 2020-11-16 15:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 050bfb288ee9eec6f781502da2e42902 SHA-1: d6df4f1586196309e0b57d42caad82e49c075f04 SHA-256: 353481060a90a1746fd082bc3ac9823dfcc2f2fbec45695fe6ec56b6f7265be4
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=how+long+does+uber+background+check+take+reddit PDF link annotation
    • https://leziwave.weebly.com/uploads/1/3/4/4/134446015/sikevena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b10302-31ff-4f8d-8e29-54c5afb033cd/47178179293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70fd6267-9c93-427a-9193-49a885f92e6c/35692899108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19dbe265-5dd2-4080-8f99-34c67cd09646/jokatanisajiximopudarodaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afce6ba4-c8ce-41e5-a308-25a9b114ea35/kudomisawilivide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/925d0d75-93fa-43a3-8a11-dc72bd30094a/dirufulawerumipufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987dee9e-6eaf-49c3-a941-bb0f62be44e3/jikusaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623d9c07-d612-4670-b275-b3c288ce1fb3/order_of_hermes_titles.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/merge_dragons_games_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/biotechnology_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/rupezakubabagapuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/lamphere_high_school_staff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ca4096-44a9-469a-bdfc-72bf035d532c/54609655661.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/que_es_biomagnetismo_medico.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_off0000b495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB495 5456 bytes
SHA-256: 1cd5c10cabfb68af5364409cef15ee74240e895de261d8b04420b33a91d55b5a
font_01_sfnt_off0000c72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72A 9796 bytes
SHA-256: 6e9b3e8a5bf32e5e68eb6ede16b630fff26f154f98b350b41024d7b8b5392fa4

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