Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9e8c6b22164546…

MALICIOUS

PDF

78.5 KB Created: 2021-01-20 12:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 003dc319819975ad7ac864b3314abef5 SHA-1: 6b6fcab19cfb4f7b084125eeec10f2797b7d7272 SHA-256: df9e8c6b22164546269afdd9faa1056b4ffc65405bb09a77df8bb32eb352da2b
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=journey+book+animal+jam+mt+shiveer PDF link annotation
    • https://gifiboluf.weebly.com/uploads/1/3/2/6/132681188/bd6419856.pdfIn PDF document text
    • https://tamosumedov.weebly.com/uploads/1/3/4/0/134017363/sufapozusu-xawutibetebo-biriki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478422/normal_5fcf529dcaf29.pdfIn PDF document text
    • http://pirawamajakemiv.22web.org/storytown_grammar_practice_book_grade_2.pdfIn PDF document text
    • https://nogeduju.weebly.com/uploads/1/3/1/3/131398368/gedomaxozebubek_nofebefik.pdfIn PDF document text
    • https://site-1174988.mozfiles.com/files/1174988/90381949647.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/sepabekosigaxagorasavu.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/leave_a_light_on_piano_sheet.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/bogobonagepumatiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_5f93845ae4351.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/3505908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450345/normal_5fc920972bc5a.pdfIn PDF document text
    • https://site-1177727.mozfiles.com/files/1177727/65326135007.pdfIn PDF document text
    • https://susudomi.weebly.com/uploads/1/3/5/3/135319884/loduba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefavab.rf.gd/84012370651.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/voucher_format_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/wps_spreadsheet_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/1602356154.pdfIn PDF document text
    • http://fonunegemo.epizy.com/tawogilananob.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/61888264153.pdfIn PDF document text
    • http://gawekavadave.epizy.com/43722137964.pdfIn PDF document text
    • http://vamejojupilo.rf.gd/java_9_32_bit.pdfIn PDF document text
    • http://semiwexojexudu.epizy.com/kairana_election_live_report.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_off0000f688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF688 5356 bytes
SHA-256: e71c4ca12d7dab3026a9c22edf56050e8b4f9ac9fa108aca0a8f3a26eb8ca6c4
font_01_sfnt_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 10436 bytes
SHA-256: b394e7a560bf2413ed0b53203a82a6a583a32f2414b06734ffc9e8483886608e

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