Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3fa68234e9a4b2…

MALICIOUS

PDF

71.6 KB Created: 2021-06-05 09:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 78547bc8551df84fef957efd82745988 SHA-1: 2f3a14d01e86018eec4b4b1bc051c6e88d5ee7c8 SHA-256: df3fa68234e9a4b2185c35cd2666ea25e022cf91a5ae4b90dee2a6389e952e91
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=synonym+of+receive+information PDF link annotation
    • https://lonunupamazukev.weebly.com/uploads/1/3/4/7/134711915/tomuwisozibilikube.pdfIn PDF document text
    • https://gekanabedo.weebly.com/uploads/1/3/4/3/134318260/525095.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4465000/normal_60b24e6417592.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/nanugaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467004/normal_60579f6751a7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501367/normal_601de2229b20a.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/bebapidigipaz-gevufakoletelum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_6029fc3f12780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_6045f2bb01a27.pdfIn PDF document text
    • https://zaxiradijewebox.weebly.com/uploads/1/3/4/8/134889682/1946027.pdfIn PDF document text
    • https://lenudigibelap.weebly.com/uploads/1/3/7/4/137499492/kugimoriwezurafavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454289/normal_600a9c6f23c6e.pdfIn PDF document text
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/vigegujewot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5ffa6b0f93b5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404755/normal_60029f0378071.pdfIn PDF document text
    • https://nusavudusegi.weebly.com/uploads/1/3/4/4/134444144/981422fb0.pdfIn PDF document text
    • https://nasuvanebi.weebly.com/uploads/1/3/5/3/135393195/tojek-jemesexiz-kigel-vififopuxefid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tazijebep.pbworks.com/f/error_code_103_1401_big_fish_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409c9134-0008-4051-91aa-aa5a74506b48/savenedo.pdfIn PDF document text
    • http://funesut.pbworks.com/f/79583778668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210c2508-3027-4d93-84fb-f3e50acd62ac/76658527177.pdfIn PDF document text
    • http://jevibufile.pbworks.com/f/how_to_install_nexus_expansion_packs_on_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd9b26d-7d03-4872-9f9c-8e41b852b59f/78887534041.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_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 5080 bytes
SHA-256: 7db36287ae2469d9a0cc77418441572d717616cde26da173567c2ff735665a54
font_01_sfnt_off0000ed2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 10464 bytes
SHA-256: d1fdbe5425b828d3720a348b1478e04a0886a8f59db509d82379caa8d36519a2

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