Malicious PDF — malware analysis report

Static analysis result for SHA-256 91011e992bf3e533…

MALICIOUS

PDF

150.7 KB Created: 2021-03-16 04:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ba4f9952e43b0e46bf057a32a1f382f0 SHA-1: e43ee4b0c2445fb3f6e30c22e4b2eb9022122a3b SHA-256: 91011e992bf3e533e410e68384a9b7db4c32b0a73509edc30be606aad364f038
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 an embedded URL pointing to 'dugedepap.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to lab answers, indicating a social engineering attempt to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/123?utm_term=constructing+an+electrochemical+cell+lab+answers PDF link annotation
    • http://formverifiedbadge.com/percy_jackson_sea_of_monsters_movie_trailerptwxh.pdfIn PDF document text
    • http://carbags.site/famizasumamekujarawonoriy62y5.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/29691016682lwbmq.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/90722356465fcu6g.pdfIn PDF document text
    • http://cz-nitrof.website/silence_of_the_lambs_cast_chris_isaak0mmcg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fukepez/how_to_develop_self_confidence_book.pdfIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_ce03c10388c9444690cedbf59bf1c403.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/how_to_find_slope_of_line_given_two_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c59a0c2-79ce-447c-b6ca-4ed8dd6780a9/48152756006.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_0a829007ac254ff9945d21e1cd7a3b79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/light_relief_model_lr150.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/elements_of_social_contract_john_locke.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_187bb41fdf494d52a14190a43becee96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/rizafixokopinisuji.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_ceee2073e47a405fb5f9f8919872aa2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2fd030-2e3b-4fcb-9919-402fd0de5097/10111825051.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/chhattisgarhi_video_gana_karna_hai.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_c1f5667de4df453588e90cc07744c6a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/jorukawederotesabeluratix.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_f9677e9e9d724bdf8b13fb014ed6187f.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 98752 bytes
SHA-256: a8de61f0cbee35f0dc039d7c9719f1241de5833aaa8b795b2d95f50f8abcabdc
font_01_sfnt_off00021544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21544 5348 bytes
SHA-256: 2807865a6e0a73541a8ec8141a40f70a0d903563ff9c5a49cc8c3e1569687b0f
font_02_sfnt_off00022753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22753 11028 bytes
SHA-256: 3f1ef9ed7bc32bd182a604bff6bb5cc7668bfb9f0808d5afe4467fd17814d93d

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