Malicious PDF — malware analysis report

Static analysis result for SHA-256 0944abc7c2ae3c06…

MALICIOUS

PDF

40.9 KB Created: 2020-10-09 09:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8dc54d458d3a6e2528b846b08ef6043f SHA-1: 6d29b733a8c0c8694133086ec70fd67d3bf5fe07 SHA-256: 0944abc7c2ae3c062fe03c34e3c871fd55c100aabdb5115b2ccc7d3498006b68
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://ggtraff.ru/strik?keyword=standardized+reading+comprehension+test+for+grade+7 In PDF document text
    • http://mukugava.bcbarns.com/uploads/1/3/0/8/130813533/febaw_waxivodig_daporib.pdfIn PDF document text
    • http://nasuru.craieswellness.com/uploads/1/3/1/6/131637814/newukumazuwusos.pdfIn PDF document text
    • http://wevino.animachristiretreats.org/uploads/1/3/0/7/130776008/4424f.pdfIn PDF document text
    • http://files.blueicesailing.com/uploads/1/3/2/6/132695701/b084e23f9129.pdfIn PDF document text
    • http://nofuvufo.shopcatchboutique.com/uploads/1/3/1/4/131438539/ramogipuvurube.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/pokevafibor.pdfIn PDF document text
    • https://site-1041939.mozfiles.com/files/1041939/xilojalezukuduwesamotel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1696/2215/files/67555918262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3508/5978/files/circle.io_game_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1066/9213/files/ludaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/area_code_732_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7263/4536/files/xemosorurotaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/59047425109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9951/5816/files/24_month_old_physical_milestones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5176/8731/files/66770227440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6146/8574/files/the_isle_spinosaurus_vs_t_rex.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_off00005757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5757 5772 bytes
SHA-256: 5b478eb5d5a5d1b952b5558a8e56af50b89d8d0ab666408fec4f58203419abd7
font_01_sfnt_off00006aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEA 14192 bytes
SHA-256: 42b23368f500eafd722dded4e9d0def358df3f3344e1aea8ecb26466ee882d2f

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