Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a7e119a2dbd9e1…

MALICIOUS

PDF

71.3 KB Created: 2021-06-09 17:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9b8c3ef49f4b5fb7f23117af1164d6eb SHA-1: 32d695b6dbdc6c6de8d7b11d42526c1d7e9870b3 SHA-256: b0a7e119a2dbd9e1199ebca69e45e5941588e4c6bd4d6d0b70b6a37f808e62ec
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'crewmak.ru', which is likely a lure for downloading unwanted software, such as 'videoder windows 10 download'. The presence of embedded JavaScript further supports malicious intent, potentially to facilitate the download or execution of a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crewmak.ru/pbw?utm_term=videoder+windows+10+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426820/normal_6032aacee7dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_604e1aaa8c5a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_602816dd98b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475861/normal_602d3b0b44072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_60531a8258c65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5fdeaba1822f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_603e9e623c371.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450434/normal_5fcf845bf02cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458150/normal_5fe68b8600a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_60583d9c9dc04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_603a6868d4098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404990/normal_60071de0ace8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerobedevu.pbworks.com/w/file/fetch/144447960/200_vocabulary_words_with_meaning_and_sentence.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/w/file/fetch/144500034/bloody_roar_4_free_download_for_pc_softonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b778091-98f1-4e83-b5ed-cdb38070de9c/joruzugoxavezapofoben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbbdc09-1e9c-447b-acc1-a5fac3fb5f09/pezurejinafoperexazabup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82298e36-37c6-44fd-ae5c-4daf27e4d992/loloxedid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70748d2-aa81-4c14-a75d-d536647e2bd6/stuart_hall_work_of_representation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f6388e-5624-4142-a339-ec0ef5114c3b/35934039964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851a1279-4e56-43da-8747-2e87ca8f91ad/tamemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cc8336-116c-40fc-9d38-26dc3a4ef8d7/how_much_is_a_stihl_backpack_blower_cost.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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 5072 bytes
SHA-256: 7cefa058f724dc8b1a0f4845dd1312a881b63b0abf5fba0f3327d0528d8c06fa
font_01_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 10392 bytes
SHA-256: fde4e6f48d47452d998896c512cf8b198bfcdf5ded871d9e55e7b73aea6425b7

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