Malicious PDF — malware analysis report

Static analysis result for SHA-256 379c08ed8e07f832…

MALICIOUS

PDF

44.8 KB Created: 2020-10-17 15:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 37942d0f72f7833dab1447ffa6b4b808 SHA-1: 4180e9b3213f300f948a17b16195b03b12bffd13 SHA-256: 379c08ed8e07f832e9e7b37a484d26a57861fad8e9eaf1d16519e7db397ae4de
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://ttraff.me/123?keyword=astral+cpvc+fittings+catalogue+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f891d2895a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f889329cba05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f879e7047843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8914196cf87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f87d5eca1018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f8a83974fede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8a71fe36e99.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://uploads.strikinglycdn.com/files/897807c6-771a-4e6c-97c8-e0850a8f3906/xidojim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd76b0e-33b4-4e76-9486-c64c9116a055/vapiwiletokafulipir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944a8c2f-f15e-4660-8a12-f09c3ab0b7ed/femupiterop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3754/4607/files/54133051699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/best_paintball_mask_for_glasses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0137dba9-bce2-4f5b-9653-30d24f7b2616/50882802586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5feedaad-5684-4457-a0a9-346d85ddd076/gukuxifovexamakuxip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c80adc0-9d1d-4140-a065-313f43cffcac/silifudisamitiveso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/movie_insider_2020_january.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7286/3907/files/cal_state_fullerton_job_posting.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEF 5252 bytes
SHA-256: 2bb6f15c778f7936465145248c486f21e63a0f44e244c086a1d769e634ce53f6
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 9016 bytes
SHA-256: fba3c42832bf19b7e6f5d76d0bcc4d41ad6f148e4e4f22cf3a60889d144695bd
font_02_sfnt_off000080e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 16172 bytes
SHA-256: 7f268005b80ff82e89639affb95403f55eddb42516abbde6a76e27226db124cd
font_03_sfnt_off00009606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9606 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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