Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc8bf9d23d8b42a…

MALICIOUS

PDF

87.7 KB Created: 2021-04-10 03:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3bff9af3bc6da60eb1ba51be669d9e72 SHA-1: 5ad78424a9416f37ad7cbcf4ff9103b3210fdb28 SHA-256: 9dc8bf9d23d8b42afaa7925733f0987f03342b73c1e612a4aa7de2d5b04c971e
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://lozipotod.ru/strik?utm_term=how+to+conduct+a+grief+support+group PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375541/normal_605bc54baadd0.pdfIn PDF document text
    • https://kaneloko.weebly.com/uploads/1/3/1/4/131408798/375bf948d.pdfIn PDF document text
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/a2b48890.pdfIn PDF document text
    • http://torchland.xyz/applied_text_analysis_with_pythona6hsr.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/7183911.pdfIn PDF document text
    • http://blablablacar.online/instrumental_lenggang_nyaiyli8h.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/xilurozirumexif_dazexaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fcc1de0c9625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_602c7da5471a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_5fd897311f8eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6022af3c90329.pdfIn PDF document text
    • http://wotagavewiwipop.iblogger.org/bubokemumepadeduxapes.pdfIn PDF document text
    • https://noxesole.weebly.com/uploads/1/3/4/6/134615833/7290395.pdfIn PDF document text
    • http://myfavoritesun.xyz/12981835682fhdl4.pdfIn PDF document text
    • http://womenit.space/puwekumefijatrgo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gilotekovipani.rf.gd/anointing_of_the_holy_spirit_wigglesworth.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdfIn PDF document text
    • http://pimodogeziwasu.rf.gd/base64_to_jsfiddle.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/effective_email_writing_skills.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/92855114372.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EF 5228 bytes
SHA-256: d816d43f9d3382b07ad1fb2fccec97611436446ac1b70ebd07ee2261652fdcf3
font_01_sfnt_off00011ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD4 11200 bytes
SHA-256: 3708dfc6b2a2ff9ed1cb79870969c34a25983e0a8bff63d620ae8b33c32097c8
font_02_sfnt_off0001411a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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