Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6680a7eea08c01…

MALICIOUS

PDF

76.8 KB Created: 2021-05-02 17:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1675fc9e763c68b87e50fe366b40c6b7 SHA-1: dbaae5bfc66ca1b590980e5ba2a9da36e7608424 SHA-256: ca6680a7eea08c01c697442617c36692d55918b87e5afdd3c9e6a627c4421704
104 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an embedded URL pointing to 'zajinet.ru', which is likely the primary malicious destination. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://zajinet.ru/strik?utm_term=what+are+trade+receivables+examples
    • http://bitsracing.net/siderafeave0p.pdf
    • http://i-men.ru/26274243432c7e6u.pdf
    • http://bagawixaj.mywebcommunity.org/australia_map_hd.pdf
    • http://creamspait.xyz/wefuxz28zc.pdf
    • http://ig-about.net/malujubamevewazotexijamuxcbe7x.pdf
    • http://nutristrike-shop.ru/anime_mugen_games_apk9gjpx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8bbfbdb8-1895-4472-a1c6-9e834ce25a60.filesusr.com/ugd/7deb27_5e6e6f5b83ef46a1903c8a6d52b50ce1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a69da5a9-3a53-4675-8786-8980d40b32ba/bissell_proheat_2x_revolution_pet_pro_carpet_cleaner_replacement_parts.pdf
    • https://uploads.strikinglycdn.com/files/3c113386-8201-4df2-9447-57c0b91d4795/functions_of_medical_social_worker_slideshare.pdf
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_0d35f83f57754c79af96521fe15a9cb9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c26f7577-ff1e-4db6-88c3-34d1969b7888/islamic_government_governance_of_the_jurist.pdf
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_21e1359ff1f0467cb396815e84bc07d3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4b56a5cf-1732-4396-b29c-e0387a2b79aa/turom.pdf
    • http://bidusibebawuz.onlinewebshop.net/affairs_cloud_august_2020_weekly.pdf
    • https://s3.amazonaws.com/palikuvexake/zumezavapinu.pdf
    • https://uploads.strikinglycdn.com/files/013f4b9e-4a0c-493e-b5c4-6b7bf8ad9fc5/94100591209.pdf
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_020013b62ccd4884a07e6c44cb231ceb.pdf?index=true
    • http://vapewokadovusa.myartsonline.com/57434312311.pdf
    • https://uploads.strikinglycdn.com/files/bdd44801-4f47-49e9-8222-ce36dfa6f594/56990727189.pdf
    • https://s3.amazonaws.com/jewizopukuni/magic_the_gathering_comic_book_list.pdf
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_979129553f3343b4bcd9dd6c75db8708.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed32.bin
fa80856d4e057a6022af9c93b6a3c09ad6f45b2e449ecac4c25d7b97f7812ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 5596 bytes
font_01_sfnt_off00010019.bin
6d07b549a6a77d1a6e0a082f4291c0554c772bf5c09dfd68e88e7573a6127ee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 11192 bytes

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