Malicious PDF — malware analysis report

Static analysis result for SHA-256 882b51f72d2ef4b9…

MALICIOUS

PDF

78.9 KB Created: 2021-04-18 07:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3949695bc16420961b58ae7593bab32e SHA-1: 7479fd74c2862cb45d0e739a3bc0805bf276ba44 SHA-256: 882b51f72d2ef4b9e78047c3b04686d674cfea0ef61a18154b09abf7fcf3a404
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://pelibifir.ru/strik?utm_term=la+magia+del+orden+netflix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408853/normal_6025d07675c43.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/solving_equations_with_fractions_and_decimals_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_6068eda61c696.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/elementary_linear_algebra_10th_edition_solutions_slader.pdfIn PDF document text
    • http://maddot.space/pasoselolunewigine2cr2r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495681/normal_5ff60e0e7e09d.pdfIn PDF document text
    • http://about-igsupport.com/80279729667wgbyp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454055/normal_603b5e8dc294a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_602125ca16b18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458125/normal_6003afc313201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fd96792ab6c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_5fe6f19023e6d.pdfIn PDF document text
    • http://mscredit.info/powerwise_28115g04_wiring_diagramq3mgf.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/32173910602jegi9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_6056b6a483531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5fe38110bffcd.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/69065711573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_6027f0320222d.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/algebraic_expressions_and_identities_class_8_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_6014b65e9789c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kewakuko/still_i_rise_poem_analysis_stanza_by_stanza.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/a_cuanto_equivalen_10_centmetros_en_pulgadas.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/single_bed_fitted_sheet_cotton.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bbc_iplayer_radio_failed_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/erik_erikson_stages_of_development_slideshare.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_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 5060 bytes
SHA-256: 819f2b8115f51652db6c3356a19a2d62ceadbf2e70e2f94e34c94d8766067b77
font_01_sfnt_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 12124 bytes
SHA-256: e6af2285fcc36316cae8e511ae64eebd6fa75b1852bb355d692983e20d0aa8e6

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