Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5eb99ae699b2a82…

MALICIOUS

PDF

81.1 KB Created: 2021-03-17 23:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd563bb0a13dbccbdb2b89f21e1230c SHA-1: 2cdcb836330695a5923709b7d74cb0a2b05df4db SHA-256: e5eb99ae699b2a8297ebf1ef2f7e80c509001906d1f116cbc0436d24b9577f70
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate this is a phishing or malicious PDF. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/award?keyword=catena+aurea+john+pdf
    • https://cdn.sqhk.co/rupomotiz/3geibij/tebunodebetepul.pdf
    • https://cdn.sqhk.co/moleselofa/ibrhaii/sarigijunuvitug.pdf
    • https://cdn.sqhk.co/tusujoxaseru/rgftWE9/9143474285.pdf
    • https://cdn.sqhk.co/bisidilit/IhzijnM/34358282147.pdf
    • http://oneplusonemain.xyz/gexumejipubogifivaxuxon1577v.pdf
    • http://lnstagramcopyrightcenter.com/65231385148nfl3h.pdf
    • http://prostotit.site/78841779335og7uv.pdf
    • https://cdn.sqhk.co/wekaradukuve/ihgcjjs/38812171663.pdf
    • http://kino-vezde.ru/283114986686mcht.pdf
    • http://topcreditreport.info/xadabipigisuwuremurbmw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d8aee3b0-83ea-4a0d-b8f9-524a85b41d10.filesusr.com/ugd/105b34_7784cffa7d5d45b9990d80bb4895de09.pdf?index=true
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_b9a96e88ca2b4a33be5fe812595caa79.pdf?index=true
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_b37292fb93594f7ca1dda93f88a4fa25.pdf?index=true
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_dbad4dc92f6e4ac8ad2dc1d6f06cf032.pdf?index=true
    • http://resisimokopi.epizy.com/17672896512.pdf
    • https://uploads.strikinglycdn.com/files/8b6daedd-aebc-4b8d-8ed1-95c0c8049edd/8406815816.pdf
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_f302877b40da45d684adda34636d51e1.pdf?index=true
    • http://wukosinigi.epizy.com/38280098628.pdf
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_f5db37f2e1c54be69f9769cc8cf81962.pdf?index=true
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_256b5f8315c54140834fa46b5e3322e8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bda8c60b-2549-4cf7-a410-2464d94b8b31/zubepekanonofetus.pdf
    • http://jatijunulefare.epizy.com/artificial_neural_network_rapidminer.pdf
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_733cffb9f52b4ce2b47649bcdfebe0ee.pdf?index=true
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_07ae2b57f57a474fbb373c3e89699417.pdf?index=true
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_0502683c3115471f9f08de9f479e864f.pdf?index=true
    • http://wepaxilex.epizy.com/green_forest_background_image.pdf
    • https://uploads.strikinglycdn.com/files/16f5c594-b7f2-4655-ab7a-911e75b1f601/how_much_is_a_hacker_mask.pdf
    • https://uploads.strikinglycdn.com/files/fb572ddf-7d89-45a6-84e5-5cd3dbfde713/jenn_air_microwave_repair_problems.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_off00010249.bin
39d0c4be7131a83a7c2cd5b047c34b990829095a3b0bbe60d3d4eb30ff3488de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 4900 bytes
font_01_sfnt_off000112f1.bin
f9451f0b55d66c8cc39806b21b8ba84bc33d02e3344b0d757c2934a7ea8e40fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F1 10696 bytes

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