Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1e5b43e22d8420…

MALICIOUS

PDF

73.2 KB Created: 2021-03-24 17:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bac6ca83b038196e70ef982e4ca03375 SHA-1: e758eff24aa60355aa9b94458aa49284b2c8c034 SHA-256: 8c1e5b43e22d842002173a7b18dbab5986779ca6af5914454bdaf1230f8f0895
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=hp+lj+p3015+parts+catalog PDF link annotation
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/8a2bd66b.pdfIn PDF document text
    • http://citimart.online/16872490638hj83h.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/jcBQjjg/wholesale_bingo_supplies_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_6010a88c8b068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_6026a9f78f2e0.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/E3jghhG/rolimopumagageb.pdfIn PDF document text
    • https://weludabaner.weebly.com/uploads/1/3/4/8/134854782/nisuvazetug.pdfIn PDF document text
    • https://lugelobixo.weebly.com/uploads/1/3/6/0/136095506/bevudupujebewen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_6045e2f083d00.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/ibF4Xib/13539921358.pdfIn PDF document text
    • https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/lebufuminugene_josetejisi_toxijobagox.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/kavidisubajoki.pdfIn PDF document text
    • https://tenusalawumuta.weebly.com/uploads/1/3/4/3/134332014/c5f8314fcb42.pdfIn PDF document text
    • https://jerisiliv.weebly.com/uploads/1/3/5/3/135314768/dadifabozeju_vaxaga_tefisajuxew.pdfIn PDF document text
    • http://zathkatow.xyz/wfg_financial_needs_analysisn5w5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fba42df-cd38-4db2-8525-2a26e4f7a8d4/608691899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23930e57-9cb9-4cea-ab67-26069a18ded5/the_dolls_house_katherine_mansfield_symbolism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f5437b-c27c-47b2-a1af-12441e7be556/excel_spreadsheet_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0716ede-f5d0-44f5-bfa8-f3c1f345aac0/hundred_chart_printable.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 5620 bytes
SHA-256: eaa0ac68e59c3f6ce67e8ff16a686a9e45661cf98f5450aeb304e3486f2c6657
font_01_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 10052 bytes
SHA-256: e632cd6695ce32c12ff7841ca8b5856d36cbaa97782461f17b02c41efa4cf3f9

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