Malicious PDF — malware analysis report

Static analysis result for SHA-256 a708e6919ff59d16…

MALICIOUS

PDF

81.9 KB Created: 2021-03-17 13:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673a7bd74e41ca06466dc7543be26595 SHA-1: 7050cec7a96bdef2e6903b9336bd51972d56247d SHA-256: a708e6919ff59d16627421b87ea9311768d14ce0882456ade1493faa336ca329
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that lead to suspicious domains, one of which is presented as a search result for a cookbook. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://kuzutuzo.ru/award?keyword=essential+alkaline+diet+cookbook+pdf
    • http://xejepurefe.scienceontheweb.net/married_life_in_islam.pdf
    • http://opit.space/fagutuketekifv4o5z.pdf
    • http://grizhoff.ru/ccna_3_chapter_3_exam_answerstcwoo.pdf
    • http://s7hmus.org/zedomagoo2w06.pdf
    • http://tevaruv.sportsontheweb.net/77370827134.pdf
    • http://busimaderule.mywebcommunity.org/how_to_make_beer_at_home_step_by_step.pdf
    • http://circulshtangcalip.website/lixaxixonh5bgn.pdf
    • http://gekodejevotug.medianewsonline.com/the_algorithm_design_manual.pdf
    • http://instapriz365.site/2119488992077opx.pdf
    • http://pifofobexaxel.mypressonline.com/39617468512.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_54482741d9bc4bcc891d9421080d9509.pdf?index=true
    • https://uploads.strikinglycdn.com/files/128267a3-e3de-4f4c-8d69-6c4a5a7dffe7/64639614652.pdf
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_c9eeea6a4eff4db88df485b906708ff4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d935aa90-13a3-472d-9977-86c2da00799a/muriwifiji.pdf
    • http://kofaxafogi.myartsonline.com/mosajig.pdf
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_72e95588f295436c86646e5228c632e8.pdf?index=true
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_53c72368016340f6a19d6d5cb5870af0.pdf?index=true
    • http://xowilewegiwo.myartsonline.com/jonajeb.pdf
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_5ba7c3ba1afd4e999a7b6686cdbf3fdf.pdf?index=true
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_09f8a16ea8fd44dfa409fb1764c07a7f.pdf?index=true
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_f8cf765c60f2461da8fe77d1c486c72f.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_off0000f4fa.bin
50ba885c3223d7c8f399a4898f1ca5c01776c8a017775914bfbf5ac1817a28aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 5000 bytes
font_01_sfnt_off000105fe.bin
65ca10f67060c0ee8887506b6202e66c295a780b19e68f0f801ef57a0e87854a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 11464 bytes
font_02_sfnt_off00012bf3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 4324 bytes

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