Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cd22b153ec868d…

MALICIOUS

PDF

40.9 KB Created: 2020-10-04 19:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c739cd1bba7b21a21e3d49fe05d48519 SHA-1: 33e34104ea599c94a7a6252cc9cf4115b94b9058 SHA-256: 42cd22b153ec868dad05cf20e7842960ddbaba50c90310ad2d96fc3cf4233d2b
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=laker+company+reported+the+following+january+purchases In PDF document text
    • http://xewesatus.threepointcolor.com/uploads/1/3/1/4/131436981/gekunopifozemanuruf.pdfIn PDF document text
    • http://tafezo.pollystretch.com/uploads/1/3/1/8/131857090/jejav.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/622ff68c-1533-4809-ad01-0d2a2421bebf/fisujat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8da731-e767-4f77-b25c-6895c1a02de7/fubijipuxaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa63160-36df-4621-b00d-674dd0dbb646/39907730740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3309/5075/files/nevenuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2526/4540/files/ids_and_ips_placement_for_network_protection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2089/files/taduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1866/8197/files/oracle_forms_and_reports_12c_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/jusivopulobegiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/labolixosaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/segatuvixikowedobudesa.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_off00005d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D49 5844 bytes
SHA-256: 6dd9381046156c1312872815adc105cf394e0c2a08b9dec9b9e7f12997092395
font_01_sfnt_off00007132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7132 11296 bytes
SHA-256: 13d12335d4099c65d4953ab5bd4b90c6cca093c010dea545bebabda3458fd69d

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