Malicious PDF — malware analysis report

Static analysis result for SHA-256 874078787bd6744d…

MALICIOUS

PDF

67.2 KB Created: 2020-11-25 07:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0b45f7fee892f2efb465252d0bb0cc SHA-1: ee8a30533b371db38a78f4240aeaa5537b52e567 SHA-256: 874078787bd6744d141c1ea4b8e3028ed3a97bf603cec05322dae3ceabf8d9ee
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is designed to link to external malicious infrastructure, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=the+hermes+paradigm+book+one+pdf
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/1814063.pdf
    • https://xeruwuxopexok.weebly.com/uploads/1/3/4/4/134467304/5907390.pdf
    • https://nimujebiparifil.weebly.com/uploads/1/3/4/7/134730121/zewubeda.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdf
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/9738096.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/051dd640-648c-4fc0-ab18-31c503e95246/12034014221.pdf
    • https://uploads.strikinglycdn.com/files/0700d916-0077-4507-bd52-09ce993f7ca9/3553487523.pdf
    • https://uploads.strikinglycdn.com/files/69c65676-3d7a-4114-88e2-adddf9f2ccdb/34418107745.pdf
    • https://uploads.strikinglycdn.com/files/322b4e8b-febd-493b-87a8-02ad5993c2a6/41266993497.pdf
    • https://uploads.strikinglycdn.com/files/cef3743c-c8d5-4fd7-9bec-8c06d75da7d9/lavitejajofenep.pdf
    • https://uploads.strikinglycdn.com/files/cc8bcc94-4457-4524-aab4-859909827c3c/gowexesatagel.pdf
    • https://uploads.strikinglycdn.com/files/c7b7210d-7c49-49c1-b5bc-4a4d7decc2d7/mexajufota.pdf
    • https://uploads.strikinglycdn.com/files/1c2f19ce-9a3f-4ffc-a866-162ad24280ea/36148926898.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7bb.bin
b257c55ca0a0848f48fb62a3414658edaa4db636f5d254e7187537511ccbbeb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 5576 bytes
font_01_sfnt_off0000da83.bin
7e4a5ded2216ef297e1f5f5d7cd55b8f50ebc193fef2fd2ded1f181feab15b23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA83 10720 bytes

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