Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e0da030b3173be…

MALICIOUS

PDF

52.6 KB Created: 2020-09-30 11:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7d26b7d4d7e2c3880ec56af55c9ccef8 SHA-1: bd96acde8d68691f87e7ea59121e37a032f7f6d3 SHA-256: 65e0da030b3173be77d8fb11e75f9738699819925a457a339592c8feab5ffbc9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?keyword=que+es+un+astrolabio+pdf In PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/91114211702.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/3122332802.pdfIn PDF document text
    • https://site-1036980.mozfiles.com/files/1036980/meronuxavosagejejakati.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/55672944466.pdfIn PDF document text
    • http://ziwilidi.fourseasonsyouthorchestra.org/uploads/1/3/2/6/132680799/fadukaxenijole_wizibo_jotevoj_wivef.pdfIn PDF document text
    • http://nanetovit.mytexaswills.com/uploads/1/3/0/8/130814526/zabutokus-guvir-lisuwuxumijiru.pdfIn PDF document text
    • http://files.dancingjewel.com/uploads/1/3/1/1/131163914/952bf1ac2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/breath_of_the_wild_recipe_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/41749521886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3388/files/joxabuvibin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/51210524544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6399/2742/files/318247235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0157/7625/files/csv_vs_parquet_file_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0483/6515/files/cinestill_df96.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 5116 bytes
SHA-256: a3c3e91300444d64f6c5e26d714b51de746502ea9a078b3dc656ec40e14c13c7
font_01_sfnt_off00007c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C28 12340 bytes
SHA-256: 0c3c292964aa350a8b8643023e8eac0b2c0b399f010c6e3bc543b3604cc237ee
font_02_sfnt_off0000a3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_03_sfnt_off0000b1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A1 6700 bytes
SHA-256: 3b3386bcec34ed2433511615210d1111b381d2d8e7ca23f9eb895919ace6128b

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