Malicious PDF — malware analysis report

Static analysis result for SHA-256 e363ba0062247ab8…

MALICIOUS

PDF

66.9 KB Created: 2020-11-10 00:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5532d2c52f0f8d0fe7b849d5b6e63d58 SHA-1: aa6a1febbf44582ff570cb24a1dc469b0ed6bac5 SHA-256: e363ba0062247ab8100676cc2f888c9f5e8ed8afad776d50b63f5539fc6a254e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan intent. It contains a large number of external links, as identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. One of the primary external URIs points to 'traffnew.ru', which is suspicious. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious activity.

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
  • 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.
  • 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://traffnew.ru/123?keyword=cox+tv+guide+destin+fl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5f936ddbda4d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5fa9c29b4d0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_5f99cfc91bffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_5fa04c7566c84.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/dexagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5f8ce385a88bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f8e2aeb21a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f8ba21dcb9c9.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/293289f2-dfa9-43aa-8083-a215693c4aba/super_mario_run_apk_latest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45c1484-d1bd-4920-823c-3300f6bf6830/sosemovimevutero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00cb39e-e89f-447a-ae66-89da88bdbb72/60908748453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2c660c-f330-4893-9929-d28372de7106/ultipro_user_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA29 4804 bytes
SHA-256: 070faacee251ab419f6267744b4a1b35541bacdb23a2f24f4fbb3944c9bba640
font_01_sfnt_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 10744 bytes
SHA-256: ca82cf4e5c60601d828eb0ad1648fbea5b5d587dc6d46365328ef8a53902a612

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