Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca7e7311202fa56…

MALICIOUS

PDF

77.3 KB Created: 2021-03-14 07:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e5bfdc20ee3e573fc89e037bb12ca30b SHA-1: 927f0e6cb75e37b63bb9318f1cade9c55f957bb1 SHA-256: 2ca7e7311202fa56f036414687e94211ad1f48bccb79efaa84c18301a622d5d8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to external malicious sites.

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://nipisod.ru/wix?keyword=traje+tipico+de+el+salvador+para+dibujar PDF link annotation
    • http://helplnstagramoffice.com/146224350980ali4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451756/normal_6048beae6e739.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/bemugozibatisep.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/eY7jcjg/25907966580.pdfIn PDF document text
    • http://astropsychology.site/you_are_my_sunshine_original_sheet_musiccsajl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_601f4382becf6.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/haZhbZG/28351713928.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/hegdWFZ/45522010118.pdfIn PDF document text
    • http://aov.one/50176263768juz6b.pdfIn PDF document text
    • http://shoop-fe.ru/2348699697spjq4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_6041fe056323d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_6048ed8858123.pdfIn PDF document text
    • http://nozumupi.medianewsonline.com/tebotemuwuxemomiwovax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_6033de87c2447.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodufusuviv.epizy.com/xibepifanuxipikofo.pdfIn PDF document text
    • http://kunijudodo.rf.gd/mojapuzufimatelagaxi.pdfIn PDF document text
    • http://lupemuvuxetamok.epizy.com/spanish_2_midterm_exam_answers_edgenuity.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/vokadatapujapu.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/senuxifujizisugafo.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/2004_toyota_sequoia_radio_wiring_diagram.pdfIn PDF document text
    • http://moduvodaw.epizy.com/62196009794.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/bevafukezonexeni.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/how_to_write_a_stage_play_script_format.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_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 5292 bytes
SHA-256: 816e6a9020c4d7619cf43ef809aba0ad5974f415d0c8a2d3381dc91c3238f57f
font_01_sfnt_off000100bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BC 11496 bytes
SHA-256: d384bf15a4119dc803249f6f84e368d860a631893d93e7fa6aad69d656a4efb7

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