Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67f1dc4f029e3a3…

MALICIOUS

PDF

88.6 KB Created: 2021-04-01 03:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: df0529fd1718fc01960b6944880ae5c6 SHA-1: 52a5e59943fa0f05a459725c5c67d24586d7a1a7 SHA-256: a67f1dc4f029e3a3bc67ae74d064bc2df587dcc7892d62e75a00f295616a540c
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating the presence of external URIs and embedded URLs. The document body, though partially corrupted, suggests a lure for a 'pose book free download'. The primary malicious URL identified is https://pelibifir.ru/strik?utm_term=pose+book+free+download, which likely serves as a download link for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=pose+book+free+download PDF link annotation
    • http://romegupemuv.22web.org/data_analytics_using_open_source_tools.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_5fdad6394b49a.pdfIn PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/tivifagugabiz_gezew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_601fca7aea949.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/26f57b57b583.pdfIn PDF document text
    • https://vupebuxotilejo.weebly.com/uploads/1/3/0/8/130814562/mukerasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409256/normal_6003999941e30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454988/normal_5ff5a777bf46e.pdfIn PDF document text
    • http://tufevasataj.iblogger.org/58933905888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_604cc2193deca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c950107-5225-4422-9d1c-c61513bc76b4/62805528433.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/kiraladodokikekun.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/abcd_tamil_movie_climax_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6617d59d-434f-4d59-9fc0-cead659745fd/self_initiation_into_the_golden_dawn.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/cervical_spondylosis_information_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9185579f-09f2-459e-a766-2a706b779618/download_gambar_asmaul_husna_satu_persatu.pdfIn PDF document text
    • http://noxudovo.rf.gd/nipis.pdfIn PDF document text
    • http://teforasabidazep.rf.gd/30022807331.pdfIn PDF document text
    • http://pagazefariduw.rf.gd/81032908875.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/what_is_the_format_of_a_scientific_research_paper.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_off00011e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E94 5196 bytes
SHA-256: 11b2ece0a5c9bee7e01c51c731f4ab5ea7e25dc0a6689bf546ec95341bcd48cb
font_01_sfnt_off00013064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13064 10948 bytes
SHA-256: 2df8b43be1a82423e61514a20fe456cd80d849a172c22d7769f2ca02938cfbef

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