Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21ca1d6473a7499…

MALICIOUS

PDF

37.5 KB Created: 2020-10-18 18:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 73cbfffe48149c0413fa4997361004b0 SHA-1: f740aca18e885488ba627946abf2641bfe4d99cc SHA-256: d21ca1d6473a7499862d0dee3a55405e41dec3c73b6a7726be1e8e3925de8d9f
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains URLs that likely serve as lures. The presence of these links suggests the primary goal is to redirect the user to malicious websites, potentially for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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://ttraff.me/123?keyword=philosophers+guild+mug+instructional+video In PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/91352.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/zanabopixajebe.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/24e426.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f8c1eca438f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8b3b00ee133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f8bfde95b756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f890a651a237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f8c4c3edf34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f870deb1cf19.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/c7f00a8d.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/8738440.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/bf478f0.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/94cd83dc-aec7-4751-ad19-2b9e1a059157/41309374320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56253d2b-2717-446a-a9b4-062cf538ef7b/tisoduras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb27672-9353-42f6-9a5b-2bff79771b1f/12612867627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/642a5700-cbd3-43a9-9436-698777be63e6/xabesiriforukogizidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0677fa8a-bb6e-4d10-b46f-3619ac492f96/jomogusaxukuzir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bf545a-1e5d-4a4d-8324-939a79d996bd/telegajagotijowilubuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703e2108-5cf0-423e-a30a-0b7aca0e1d6a/birosob.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_off00004b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B89 5548 bytes
SHA-256: 83df07303ea6bf4449be1adf577bed025fb918c3fb8e4f55100ec7da497e2387
font_01_sfnt_off00005e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E45 12592 bytes
SHA-256: 01d8f72b84ff1987c78bbd454ca9cb8a306da52f983d77c1e1fafcbcb3a8d6fc

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