Malicious PDF — malware analysis report

Static analysis result for SHA-256 d325ae7e900467ec…

MALICIOUS

PDF

36.8 KB Created: 2020-09-16 15:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 24a8fd6cb58458a8ee24c3897bce6308 SHA-1: 283f77881a1877330031cba225a715de6b18639a SHA-256: d325ae7e900467ec55fc09044b388052be7702fef471b7f7006e445a98444507
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://ttraff.cc/pify?keyword=juramento+a+la+bandera+usa In PDF document text
    • http://sosipawov.academytaichi.co.uk/uploads/1/3/1/8/131856772/9672347.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d3caf7c6-2e8e-4fa8-afb5-228ca9d4e38d.filesusr.com/ugd/143c98_0e08a2f55a3a4cfd81f0150e74cbcedc.pdf?index=trueIn PDF document text
    • https://7e357edc-41f2-449e-836b-5ba509df91c6.filesusr.com/ugd/384ea4_1f00a9ed615a4986ac5669b7ef2bd14a.pdf?index=trueIn PDF document text
    • https://87abbf3c-220e-4f82-813a-c3ac0df448fb.filesusr.com/ugd/f91cf1_a2e1902e21ac4be88024b48c92a35c0e.pdf?index=trueIn PDF document text
    • https://10691afd-eaad-46e1-99fd-2aede6d38ea5.filesusr.com/ugd/f99735_f5bb55ef23ff455693d45bad69df96c2.pdf?index=trueIn PDF document text
    • https://8d393793-5737-4771-8eb9-29c075622d83.filesusr.com/ugd/65b209_66587d5e7dee4f5da652add3ced84a6e.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3544/6433/files/nalow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/82422606963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/xumamuvipiweveranafenal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/sarpy_county_landfill_nebraska.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/add_multiple_rows_to_excel_spreadsheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4789/4692/files/ancile_uperform_sap_productivity_pak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4300/2270/files/makalah_apbn_dan_apbd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/mefugubot.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_off00005028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5028 5100 bytes
SHA-256: d3a09f06ce83f2476e1f573f7f951c93bbaf6bdb7183e81f42c71b1dbe91c8e0
font_01_sfnt_off0000615f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 10916 bytes
SHA-256: 3d3dcbf3d7b02ef1a76af671cb20df70d33a04dbe4de919189533ae69d744e27

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