Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c09a9cdfcef62b…

MALICIOUS

PDF

70.9 KB Created: 2021-03-18 06:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a8f9fba2b38a4c8b732902388e7a552 SHA-1: 258198c85b0a0f62b0043cde271b39709f464912 SHA-256: e6c09a9cdfcef62b4ec4d36ec8b33d90676e5a5f8e73650fe34d883ae21a919e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing. While no scripts were directly extracted, the nature of the embedded links points towards an attempt to redirect users to malicious sites, likely as part of a phishing or SEO-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/strik?utm_term=engineering+drawing+standards+manual+nasa
    • https://static.s123-cdn-static.com/uploads/4461766/normal_5fef58c2ac5b4.pdf
    • http://dororuminaxa.mywebcommunity.org/45834194638.pdf
    • https://static.s123-cdn-static.com/uploads/4382779/normal_600191325dad3.pdf
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcb369032bd8.pdf
    • http://vadosaj.getenjoyment.net/how_much_hp_does_a_lamborghini_gallardo_have.pdf
    • https://cdn-cms.f-static.net/uploads/4424985/normal_604347925a189.pdf
    • http://xufuxenu.mypressonline.com/how_to_design_a_website_using_html_and_css_with_example.pdf
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fd6ee739b359.pdf
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5feb9120f10b1.pdf
    • https://cdn-cms.f-static.net/uploads/4478398/normal_6049c85a07eaf.pdf
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fcad83c7cd3a.pdf
    • https://cdn-cms.f-static.net/uploads/4459481/normal_6052a5e9416e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/df9ed846-d973-4e59-a04c-0596f71b36a0/vusiridurifanezetoxes.pdf
    • https://uploads.strikinglycdn.com/files/a42e897a-00e5-43a9-97f0-28371ce2f5d3/how_to_reset_lowrance_hds_12_gen_3.pdf
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_4c765e8f4e4f4fc2960a0ea3fa550975.pdf?index=true
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_5c06514594d64bb98b7511748f720d41.pdf?index=true
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_9fe5b29313e1414ead4f9b7781d26268.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c25715cb-5e13-4c2c-8e23-9dfb39992d96/how_much_does_a_sandwich_bag_weigh.pdf
    • https://uploads.strikinglycdn.com/files/599dffc8-ce6f-4e95-857a-13281bf42594/what_are_the_three_elements_of_poetry.pdf
    • https://uploads.strikinglycdn.com/files/9da10b38-f70b-4cf6-84be-de9b606f13ae/xiwadawugu.pdf
    • https://uploads.strikinglycdn.com/files/20bc0aff-d94e-4327-bcfe-a3377c2ee811/what_does_the_bible_say_about_virtual_reality.pdf
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_92cd1fda59f34cdf8b10e1dc41b91bbe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c68d4267-e4ba-4f0f-86a2-64f086bd44db/68817081470.pdf
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_b4707e853f714681a877470f794263c2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7df532e1-5191-4ec7-81fa-b798ed6c1aee/kisoxoxagenufezer.pdf
    • https://uploads.strikinglycdn.com/files/c9fd7082-32d7-47b8-ad55-fd263934c2fd/what_age_uppababy_rumble_seat.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da02.bin
2d748082275563aa0a5bddf663a7191320b2c51b485cb96e51f92187431b9949		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 5196 bytes
font_01_sfnt_off0000ebac.bin
459d4f77154b4bef5ee9f9d24735ec491fb61eea8aad1cea1034aaccc0068d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 9784 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.