Malicious PDF — malware analysis report

Static analysis result for SHA-256 e363b27fd79d6da3…

MALICIOUS

PDF

71.2 KB Created: 2020-11-17 08:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1cbfaf92066f31770224f1b47f49e4fd SHA-1: 19466f66464b4dc4866815c29e2c7df17d486d6c SHA-256: e363b27fd79d6da348067108c3bc7a457c7cc57e88993c929151ed612a323f05
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous malicious URLs is a high-confidence indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=ergobaby+360+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f9f07ed2392d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f920c1819473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_5fb367817f66b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5fa02d424317e.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/warujepulubawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5f972bca76cc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5fa309c39e8dc.pdfIn PDF document text
    • https://kefanizitadibuz.weebly.com/uploads/1/3/4/3/134328212/51c057c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493589/normal_5fac32f430190.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/sazebekijepesev-vobat-zewujon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5fa24153409b0.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/e5d81cac-8378-4caa-bcda-3ff07c8c62d3/retedoxowinovox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934ee03a-3a76-4ed8-96b4-64176ef28ba2/16144045276.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FC 5488 bytes
SHA-256: dd559216ec93dd83b912e81dc1cf1a890641d5583c70ca0f9323b69ab7c1cc6b
font_01_sfnt_off0000d89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 9832 bytes
SHA-256: 5b752d485992c1a19c2ad94cc8cafacde5aba3fbd9df8e77ae53c3fbf57a7a60
font_02_sfnt_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d

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