Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d81d0dc01d9f28…

MALICIOUS

PDF

71.2 KB Created: 2021-02-24 04:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 177388e8d85715e4c3f8d9fa9ed5f5b1 SHA-1: 21e80123650d76dac1e2f280b35ef33d6c0d64ab SHA-256: 21d81d0dc01d9f287d3714e34aea01ae38c02d1746a1df10c3ea4cc45b621d37
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, appears to be a search result for a benign query. However, the file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely serves as a lure for phishing or malware delivery. The presence of an external URI heuristic further supports the malicious intent of directing users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wix?keyword=disney+movie+quotes+funny PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fdf131d5b35d.pdfIn PDF document text
    • http://logmeinnow.xyz/amplified_study_bible_offlinemnqym.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405437/normal_5ff459aab1eb2.pdfIn PDF document text
    • http://winwites.space/vumurivisariwin0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409257/normal_601b7d24e05b6.pdfIn PDF document text
    • http://moxolesapudeli.22web.org/ampyra_patient_assistance_form.pdfIn PDF document text
    • http://usecabinets.xyz/how_to_become_a_successful_team_leaderhftwt.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/dowesitobuga/xaxufibet.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/gestational_diabetes_guidelines_nice.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/ff14_bardam_s_mettle_guide.pdfIn PDF document text
    • http://lulikeleweworup.epizy.com/20483462004.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/how_to_learn_tai_chi_fighting.pdfIn PDF document text
    • http://gelutusuxipedib.rf.gd/information_of_endosymbiont_theory.pdfIn PDF document text
    • http://movozenumoz.epizy.com/lagamilizogupewanem.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/3948350669.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/project_budget_template_excel_2007.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_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 4864 bytes
SHA-256: 43bc079cbc5cc04a63439600a5f23a51c53eca68a1130315ac1a85e2c90b1b1a
font_01_sfnt_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 10348 bytes
SHA-256: 6dccd92c4443d673a96f6cff8ddf8ec07f18f4efb0f91854526f481549538e0a

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