Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc685e03d6aee5a9…

MALICIOUS

PDF

42.8 KB Created: 2020-10-31 02:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b2ce40f4289881dbe2d8782b19d15fc9 SHA-1: b7b10ac992d1e398f43f8b0e205dd80f9b739925 SHA-256: fc685e03d6aee5a9d6694508ebaae05d2c634d85bec17c83d35df2a442bd3392
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ttraff.ru/123?keyword=gigabyte+ga-z77x-ud3h+manual In PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/0e81a5aa.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/zetare/composting_and_biogas_production.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0924/files/973936504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c2676b-1870-4062-bab9-4c002da9ed2b/9th_anniversary_gift_willow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2903/6199/files/brindle_long_haired_mini_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da074a11-4686-491f-9bf9-e2b83047c556/zozikagivotose.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/human_aging_process.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/ap_words_list.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_off00006409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6409 5632 bytes
SHA-256: 6a3ac6133b75561bc83aea3cbd404d508e6b6d576288130e9e927fbaf546f473
font_01_sfnt_off0000773a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773A 12268 bytes
SHA-256: 4e37ed85c39ddd76d1480eba1ae6c00754d51999383c44510f868487fe4ba32e

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