Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1cba47610a6c74…

MALICIOUS

PDF

76.9 KB Created: 2021-04-12 02:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 33fa9c0036edfdfef592c300dd6e5611 SHA-1: c8813015f52db041b42b6ad15befe7ecbe78ef8a SHA-256: 0e1cba47610a6c74945b527a029a23b294d648ffe7322973bd24596fa04aa39e
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 0.9991

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://golowaki.ru/strik?utm_term=mechanical+systems+engineer+boeing+salary PDF link annotation
    • https://cdn.sqhk.co/gutejalajige/4gdtFji/glitch_camera_app_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453118/normal_5ffdd480f2529.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/7ihhfsn/92550287858.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/h0ghYji/funny_animal_sounds_try_not_to_laugh.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/mcts_guide_to_microsoft_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/gizulakofo/iQaieV0/36771993563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368228/normal_5fcac50e4753d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465694/normal_5ff76865dab1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_606118061cea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_602fe2200ef1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_6036cffbf1541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_6052a9e491bb8.pdfIn PDF document text
    • http://nunejabu.scienceontheweb.net/75084229483.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/bbc_compacta_class_11_english_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496381/normal_6039b8bea4b84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxepivol.myartsonline.com/labotugimepati.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_9fe3bfafb4814e578608739336a883f8.pdf?index=trueIn PDF document text
    • http://joberemig.atwebpages.com/tutorial_balsamiq_mockups_espaol.pdfIn PDF document text
    • http://posikin.myartsonline.com/materi_akuntansi_biaya_lengkap.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_795ec1fbf4724a778c1dc2371ea28f7d.pdf?index=trueIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_90a5b1b4472b4d1d8730499a00a10e39.pdf?index=trueIn PDF document text
    • http://xijejuvi.myartsonline.com/general_properties_of_acids_and_bases.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/gidakufo.pdfIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_ff942a17281a4ebc989eacbfab2c1464.pdf?index=trueIn 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_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 5460 bytes
SHA-256: f00b47d225e88f456f0725aadbeb50440f076779a8f918a1b738435baf6c63ef
font_01_sfnt_off0001000e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000E 11268 bytes
SHA-256: a00e71311900987c47eb3fb559f1ea95e7cab98408f778cbc6a773d2ac733313

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