Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d673460329cd3a…

MALICIOUS

PDF

83.9 KB Created: 2021-04-07 09:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09fa37986e27ccfa56d161a5d274ecf2 SHA-1: b2ff985b4b4b99b2205b414ed6ec5fdc5305cfb7 SHA-256: 75d673460329cd3a6a5efd913f224eae84444efd2bd521c8f5428a0cc3621f5e
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 0.9998

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://botokaw.ru/strik?utm_term=what+was+job%2527s+job+in+the+bible PDF link annotation
    • http://creamwalls.space/what_time_does_pals_openu7y80.pdfIn PDF document text
    • http://italy-small.space/numbers_flashcards_for_kindergartendyq1b.pdfIn PDF document text
    • http://buledumemo.iblogger.org/2015_audi_q5_owners_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_6014716cec1d9.pdfIn PDF document text
    • http://jixelaxoli.66ghz.com/an_apology_for_poetry_analysis.pdfIn PDF document text
    • http://show-visitor.xyz/12603591173kq8x2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_602251415ce21.pdfIn PDF document text
    • http://kakerusejom.iblogger.org/tannery_wastewater_treatment_process.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_aeca60866df54916b6492617b151b906.pdf?index=trueIn PDF document text
    • http://lenomona.rf.gd/dobalozizew.pdfIn PDF document text
    • http://kebazetugo.epizy.com/hp_deskjet_2541_ink_cartridge_installation.pdfIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_1cc8aee15f7f4b2e8a49113a6fbfafd2.pdf?index=trueIn PDF document text
    • http://velirogajebabe.epizy.com/91941052224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1639ae-e58a-4c67-baca-b3feb91cd92c/fufevibudogureditavomopir.pdfIn PDF document text
    • http://vewigosowozozi.epizy.com/peter_drucker_management.pdfIn PDF document text
    • http://tosoxokav.epizy.com/american_english_file_3_2nd_edition_teacher_s_book.pdfIn PDF document text
    • https://6ada6c45-9e8d-4063-9633-40b9e375d9b0.filesusr.com/ugd/9a7afa_2b43dcdb374f4c2ab168c903bb5f7683.pdf?index=trueIn PDF document text
    • http://xepadegi.epizy.com/14458583437.pdfIn PDF document text
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_961c47ee05e840238a28d79e10f2dbe7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/649e998a-4767-4a66-b456-8f138265d459/popabekidu.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_off00010be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE7 5032 bytes
SHA-256: 07108e08f917e953ba13155b8a5ddf5229f035bcc3366a031c9b811029e605db
font_01_sfnt_off00011d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D22 11020 bytes
SHA-256: 13bc98969c21faac0aae63f60254f768d850fb76971810a21d36efe6930a9cb1

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