Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eace7b28d90e2b0…

MALICIOUS

PDF

81.0 KB Created: 2021-04-15 16:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9007f23d65b8304ddf6143ee09d9a9fb SHA-1: 83b6963b49a4de6ef4bc9287633e4b78d0cfa48f SHA-256: 0eace7b28d90e2b014b3f7c97f568964d7ad45eed956957e835386bfccd57f95
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm or phishing operation. The primary URL, 'https://dugedepap.ru/strik?utm_term=will+gta+5+be+backwards+compatible+ps5', is presented in a way that suggests it is a search result, likely to trick users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=will+gta+5+be+backwards+compatible+ps5 PDF link annotation
    • https://cdn.sqhk.co/purorelaz/ienheYs/96312050284.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/eSgehdk/auto_tuner_voice_apk.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/fd729400d47.pdfIn PDF document text
    • https://cdn.sqhk.co/wedifedaguju/hchXijI/66058965954.pdfIn PDF document text
    • https://waxamelajawima.weebly.com/uploads/1/3/4/6/134680886/xinukifixoroje.pdfIn PDF document text
    • https://kobuwejen.weebly.com/uploads/1/3/0/8/130873730/magomi.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/ieggek7/worofavobezofaxivijug.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/a659d024c3eef0b.pdfIn PDF document text
    • https://xonifosanonozo.weebly.com/uploads/1/3/2/6/132680915/rigul_pulisok_kumeref_wevav.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/SspPXTq/2d_shapes_games_online_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_d59e6e059b9a4e739550c76b5311d709.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesixefe/80842867419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7050b114-cb07-4346-afca-3e16aa5f001b/tazopaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/cnet_vpn_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/7th_grade_common_core_math_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11a8c9e-93d8-42ea-8f8a-f5b9a8d69061/oracle_database_12.2_end_of_life_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9407b4-02ff-4c20-9012-f78a103b8c95/how_to_use_construct_3_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185f9a15-085e-4d79-81b6-41ec2a63027f/68302490701.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_0cd14d3cc09b4d2298ede704cf3b9936.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/rukogapixekixed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67349caf-bb37-42f4-8cde-ea941ce716d2/seo_2019_learn_search_engine_optimization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8772413d-2101-4fea-be43-6c1ef5122516/integrated_chinese_level_1_part_1_workbook_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f0479a-440c-4f60-ae32-6834a56969fb/what_is_meant_by_typography_in_malayalam.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_9c86a17eb1a6403e8a2d9d4ae29f8d76.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdcb2a7f-98b9-4d93-8d83-66d4b58710a8/witofiwituwemubanewolu.pdfIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_d557dce431314965ac4a7d8ec30afa69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1cb5e95-4ccd-4393-82c3-4703598b57c3/por_que_se_creo_la_maquina_de_vapor.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_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 5824 bytes
SHA-256: 61b036e5d523fcafe501796e2a9d36be11d0e18cbea99442e5036912806f1177
font_01_sfnt_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 11572 bytes
SHA-256: 28a8fff65e14651908c984e81118494e17514cce5fb9494dff9d5a3223ff6b30

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