Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4298fcc1c1903e…

MALICIOUS

PDF

73.8 KB Created: 2020-12-17 19:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ea41de95d7acf77bd6a7e6f785f99080 SHA-1: e782ab8997cdaebda7fb3958e428274b8582bf09 SHA-256: ce4298fcc1c1903e497d9037e51c3b2f9c8c646502fbecb2408b88b5f174b611
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=how+to+get+free+rp+on+league+of+legends In PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/rufozonemum.pdfIn PDF document text
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/kamatewezefa_baxozok_joxeped_tesofuvabaneb.pdfIn PDF document text
    • https://miwebuzoz.weebly.com/uploads/1/3/4/0/134095964/7596547.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/c2f0c0d.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
    • https://uploads.strikinglycdn.com/files/3f390165-7377-453e-b8fe-a4cb1ff54881/28322996047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff550d1-81b8-4b43-955f-1606cbc4bc27/handwriting_without_tears_cursive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e100f7-6dab-42bd-81a7-22be4e271970/xaxeralolumofep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8fb2ae-eda1-409d-bb6b-d1ce4ed67d3f/65928120381.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe37d83570fb44d1ce3064/1606301657053/killer_whale_cursor_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f352c491-7508-48cd-8be4-a17c9c1f2639/gobotomavawexolono.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd04aeec0a1d2b4e56c78f/1606223024260/faxuketosojasanosegaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/028b1861-581c-4102-8642-1c7f9855edf9/93961694544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20b077b-8340-4333-9fdc-bee3289cc70b/70246415242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110b06ed-7240-471a-bb59-9a60749ed9f9/66204547318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b03e7d8-cf6e-488a-ac0f-a310615ce53e/58692878360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb961b81-b017-42bd-b2f4-7c2e6a400de8/poziruninofadufivowurulud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e9ae5b-8648-4d77-b277-8314a94cfe08/harvard_pool_table_manual.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_off0000d5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B0 5096 bytes
SHA-256: 0455e7b413fb95dac4b9a4bc967b98275b729496f7d41aebf3b9144d8e14394b
font_01_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 10764 bytes
SHA-256: be63f6c9cf90e576eda7e77c814c5647e8359054649c5c1d8b02e351232d6395
font_02_sfnt_off00010bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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