Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0f9f9160876d5b…

MALICIOUS

PDF

78.7 KB Created: 2021-03-03 15:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 95b18a3b4e57ca1a1b65d9de22fde307 SHA-1: b5654d99411e0d59bde619d9ef0e7cd5b939f2f9 SHA-256: ec0f9f9160876d5b5603970d5456ca37f63c557eb6fa0677f0952194f82f9300
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 0.9997

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://xezojetit.ru/123?utm_term=cygolite+hotshot+sl+50+manual PDF link annotation
    • https://dagonaluwekala.weebly.com/uploads/1/3/4/6/134614864/piwejanotixofug-wovuzobez.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/2230654.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/wodokilan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_60152812aedfe.pdfIn PDF document text
    • https://cdn.sqhk.co/rawavuzom/Khe2Unb/vavegexuzisuvozeta.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/9341177011.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/xuzezenolatu.pdfIn PDF document text
    • http://kufudizaja.22web.org/gatusina.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/bafalozor_manipamifimi_wupuvuwiro.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/Ohbhehh/wawaso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420250/normal_5fe1c9b77491c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fd5f34f6f2a2.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/hvCghjc/marco_vip_betting_tips_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/eC3YThg/schema_electrique_d_un_alternateur_triphase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jigiwema.epizy.com/hide_worksheet_in_excel_2010.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/mefepujibusijave.pdfIn PDF document text
    • http://lelexuxifu.epizy.com/playing_with_fire_blackpink_violin_sheet_music.pdfIn PDF document text
    • http://gagelenobom.epizy.com/how_to_say_hello_in_american_slang.pdfIn PDF document text
    • http://faxanudof.epizy.com/ppap_manual.pdfIn PDF document text
    • http://fepapasofefo.epizy.com/us_amendments_list.pdfIn PDF document text
    • http://jizabimumonox.rf.gd/clinical_research_cover_letter_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_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 5276 bytes
SHA-256: 980c71271d328679b1825c111e2758b4c7569b2c13184a4e9392135a1dbd097f
font_01_sfnt_off00010673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10673 11548 bytes
SHA-256: a99344c35d55d7935e800505cb94999dda5edc5b70ba793fb5256bfcafd6581b

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