Malicious PDF — malware analysis report

Static analysis result for SHA-256 959cdb14f3d9be95…

MALICIOUS

PDF

55.8 KB Created: 2020-10-17 13:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c83b29976074884b40dda7b4e0136562 SHA-1: b79c38819b6c208843f6b73a821f9ba34a224eba SHA-256: 959cdb14f3d9be958efde30fcab70318773c7fadb5419d812d8a4865ca394b3c
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=gta+v+dinka+jester+customization In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f86fecf0076f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f88c51888b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8a55adbe0d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8965bfd6b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f88d56ad52d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5f8a1e3f615ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f87899c97381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f875d34844dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8753e4f25ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8822ad3fed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8a72ed829f3.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/53835bd3-6f6d-45e6-a5d6-d1997c8cb396/wejagugofemanef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0fcbfd-6d14-4714-b119-479121b444aa/74810739564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc5732b-0464-4e6b-ab03-ec645c6aa0d4/14974902604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe94c5c0-19d9-45d7-ae5f-b83f07e2e2c6/kis_kisko_pyaar_karu_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043f120b-2e1a-41ce-add2-ff0aa7395b99/rafoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e2a160-730f-4bb5-851f-677edceae94f/54946327369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40140885-5e57-4faa-b2e9-96d1d33726b0/kiera_cass_the_crown_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ffe761-dfe6-4276-aeea-c34565f4eb70/42609015831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d61e3f5-d0d4-4e54-8e7a-8ffe58975037/76430679620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dde3d9b-58d8-4f9e-a89a-be1f1064221a/wupalowupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef501eb2-e8cd-4cf0-9c72-ca8df1bb908a/wuluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6cbab1-2132-44fc-ada2-91792115f3a9/95166414904.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 5216 bytes
SHA-256: 1acd1368ded8190e4eb896a4ead23b4134771caf1b48f183dca04ea315f2a2b6
font_01_sfnt_off00009492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9492 15216 bytes
SHA-256: 05a8501cd80bb25c7a1b443bbdb64b14c47b551971f5adb8e284743396a04cd4
font_02_sfnt_off0000c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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