Malicious PDF — malware analysis report

Static analysis result for SHA-256 02be3b90f35dea92…

MALICIOUS

PDF

82.2 KB Created: 2021-03-31 03:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b89c62b7618c7825b45fdc4aa324d98c SHA-1: 15d3b94b766c5cd3ffd7d41de6936eca4e3d242f SHA-256: 02be3b90f35dea923f962a3068a0fd7d9cfb20863a35a8e7a172a2df838d9740
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI and an SEO redirector link suggests a phishing or malware distribution lure, likely attempting to trick the user into downloading a payload. No scripts were extracted, but the PDF structure itself is designed to lead the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/award?keyword=standardization+of+sodium+thiosulfate+with+potassium+dichromate+pdf PDF link annotation
    • http://igclienteam.com/counseling_worksheets_substance_abusew8gre.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/72256671038.pdfIn PDF document text
    • http://pet-guru.shop/brain_out_level_69_answers_mirrorepdjk.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/piruteguwosutitasupido.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/alimentazione_ayurvedica.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/pulibusadiz.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/axum_kingdom.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://xunudijumo.myartsonline.com/tuzemexizijudonunapofo.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/62437553845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a20e8e4-d8ef-4810-b35d-b82001b2cd68/how_to_use_innova_3020_rs_code_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc6a085-8e50-4391-9c84-55286d5642f4/sawubaru.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/building_construction_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/breakup_party_manayenge_status.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/gepilujutusepux.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/subiganukakijedepa.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/simple_html5_css_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/platicas_de_bautizo_por_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61555f7-2995-459a-942d-379032003190/nofobediruxojegotefes.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_off0000f4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 5520 bytes
SHA-256: a9ca9a4d04e09c7e0c3e643318abb6bd1115739a8689f437d75cba966dd65789
font_01_sfnt_off00010788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 10928 bytes
SHA-256: 5385e7bf9f789f30e1fbd87b09e1b70aaca7eb7253a7a0b98525e062ddb2ac8c
font_02_sfnt_off00012cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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