Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee42083bb33d31e…

MALICIOUS

PDF

81.8 KB Created: 2021-04-04 20:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af466044667185ca626b84db68850053 SHA-1: e15ce262d36e05c7389273b11954d76564e5010a SHA-256: 3ee42083bb33d31ed8b29fab66e2bf6b2805b72bafdf2f296d149aae4bdd2ff6
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malicious document, including a large number of external links and a high ML classifier score. The embedded URL 'https://dafemum.ru/wix?keyword=biggest+loser+30+day+jumpstart+pdf' suggests a lure to a phishing site. Although no scripts were explicitly extracted, the PDF structure and external link farm indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/wix?keyword=biggest+loser+30+day+jumpstart+pdf
    • https://cdn.sqhk.co/zaweniwefi/pPjejc1/biketoberfest_2020_ormond_beach.pdf
    • https://cdn.sqhk.co/begokaxawip/hc5V6U9/85781270153.pdf
    • https://cdn-cms.f-static.net/uploads/4445880/normal_60117dd24e3f7.pdf
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/6303316.pdf
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/649455.pdf
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/8163807.pdf
    • https://cdn.sqhk.co/neseleko/hcijhem/maze_kingston_garden_furniture.pdf
    • https://cdn-cms.f-static.net/uploads/4413110/normal_604add6fd442e.pdf
    • https://cdn-cms.f-static.net/uploads/4374708/normal_6055110140f30.pdf
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/5025784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/moduluzuxikari/nikog.pdf
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_abe3d10cd4eb46548be73f1683b8f0a7.pdf?index=true
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_ea367e48b1394f6f98b4f5234036a6fb.pdf?index=true
    • https://s3.amazonaws.com/samopakamefap/56186945370.pdf
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_d960c98d847e4fefb1513980dc85654a.pdf?index=true
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_73cfc0845b3e442ba051240c355df2a9.pdf?index=true
    • https://s3.amazonaws.com/lawakux/lenovo_legion_y520_driver.pdf
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_30145d31854043f3ac616011e92b6c0f.pdf?index=true
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_24e2ad3109444d45879a7237a403956a.pdf?index=true
    • https://s3.amazonaws.com/bokelur/cv_europass_francais_template.pdf
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_6a121df5e665414aaa1b02ee73b2e34e.pdf?index=true
    • https://s3.amazonaws.com/gopifu/aramid_fiber_sheet.pdf
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_5e7e7fd0eee4410b96d9acf979ec4b81.pdf?index=true
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_86c3ab2447054e7ba7151a258bc1ffa8.pdf?index=true
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_35e7202b56a84d13be4e32f1bf794559.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f304.bin
4f142ba3016eebc341b80c1476c2ac16f08d6eb058aeab3116a2591bd7b41431		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 5668 bytes
font_01_sfnt_off0001065b.bin
2e7b6af207e7457d4029d73a38afa83d46c7f8888fea3da64b9afcb03270a5a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 10648 bytes
font_02_sfnt_off00012adb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADB 4324 bytes

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