Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c67c4cd1951e4a…

MALICIOUS

PDF

74.5 KB Created: 2021-03-31 08:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: d1359fcd119a29d478bb3f368bf00a47 SHA-1: 94a57b621a35ff1599de133d222d94c09f598977 SHA-256: f3c67c4cd1951e4a72dc43c4dcc10c17d9a7c40c4fb63eca20c246e501126b42
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt, and impersonates a cloud document lure. The primary malicious URL identified is https://ponafet.ru/award?keyword=basic+excel+pdf+file, which likely serves as a gateway to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://ponafet.ru/award?keyword=basic+excel+pdf+file PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fce3ebf97901.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/3ckbBGL/lobofopozerilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5fe4b6bc5627b.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/gCTggif/sfg_2_3._9_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/7AtD55y/best_photo_cut_and_paste_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/hfgfmjL/my_first_words_book_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375887/normal_5feb6750ad289.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/pwjjgfK/74733115433.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445101/normal_5fcf132e5e68f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_603a14298b0d7.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/ighvigf/gagabar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5feb97a0a66fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_6001cf6d62ca4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_b22c7103f82249bb97d10a06f571a183.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/neruseg.pdfIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_b766caa5190e4273b11479107dbea85e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/xiguviwab.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/11843135496.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_97538bf3f1314fb8b34930761b3d713d.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_cce04a2c9dad446e9f4aeffe744c015f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/xadetar.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/create_a_newspaper_article_template.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_off0000e6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AB 5172 bytes
SHA-256: 58bf71257fea0bdee08f06876170b73a860e835b20d316da63b1cf3110bf0c4b
font_01_sfnt_off0000f861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 10568 bytes
SHA-256: 2b192f1f284ed6bbbf83ceb31d00534fe24838f11355c7d19ab17faf58519f60

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