Malicious PDF — malware analysis report

Static analysis result for SHA-256 18513576e5249ccb…

MALICIOUS

PDF

82.8 KB Created: 2021-04-06 19:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f3e8a4d6d178723b61c29d1b49c9c596 SHA-1: 63e719d9ac8a41555ea880aab43df1753b0dc890 SHA-256: 18513576e5249ccb427e348df9b288a92b85a46a6b931f24eb753fc467f58741
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to malicious content.

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://nipisod.ru/award?keyword=addictive+thinking+errors+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477163/normal_5fd157f83f123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fe550e06ca1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_601da16e23aae.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/34804038502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5fd08ca84e685.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/AIgflPK/bellator_mma_lightweight_champion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485005/normal_5feb7e7410297.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/hikAgiN/27951709386.pdfIn PDF document text
    • http://zisesir.22web.org/descriptive_analysis_in_qualitative_research.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/didhcih/52891821871.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://setoxevo.rf.gd/fosinonijutumopifu.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/melaxefoveladaxofaronelu.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/roku_2_xd_still_supported.pdfIn PDF document text
    • http://fefisapuvekebi.epizy.com/arifureta_light_novel_volume_9_download.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/zenazuvifezelepelozipit.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/what_is_the_best_app_for_coding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f40a7dfd-1d77-4ba6-a794-e1474d55c438/ridgid_planer_blades_tp13002.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/jaxin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ddc7fc4-cc3c-4613-a5c7-21726aed3409/eureka_math_grade_7_module_4_answer_key_lesson_11.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/fowutijewiwepife.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 5076 bytes
SHA-256: 165416ed5243e8e9c4d7e58eb1dd274e5046c380e6e217be0ebdce288f555de9
font_01_sfnt_off00010cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBD 10344 bytes
SHA-256: 66af6fde964223097afa5c2f7879ac1a17393cb320cce5238dfdbfceadf795b7
font_02_sfnt_off00013021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13021 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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