Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94d2dc8c390a555…

MALICIOUS

PDF

72.1 KB Created: 2021-02-15 21:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 87bea4efd6fb23f75e3ca6fba8572c58 SHA-1: 08bddfd08d8cc7963ec0018cad3e90630256daee SHA-256: c94d2dc8c390a55505be04443aebe18e14d9d2b8b6eca6b210e1f486dd0241da
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/wix?keyword=benfica+tv+online+directo In PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5ff287861d4b4.pdfIn PDF document text
    • https://suxegetolikas.weebly.com/uploads/1/3/4/0/134097713/4009848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473052/normal_5febe0cd8c582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_601f88e11e519.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5fc87ccce3d25.pdfIn PDF document text
    • https://zakikubefetopu.weebly.com/uploads/1/3/2/6/132696201/1418050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_6017b4cf60619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_60111166bafe8.pdfIn PDF document text
    • https://sikiwakasizo.weebly.com/uploads/1/3/5/3/135318116/894f0732ea5793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodikisiti.rf.gd/8185306173.pdfIn PDF document text
    • http://kilirafesiva.epizy.com/beyond_meat_sausage_nutrition_information.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_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 4944 bytes
SHA-256: ad7b104d8f65856da52e990a647b400bc53b5d5894bd6ac41f528bbe4eb0faaf
font_01_sfnt_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 10460 bytes
SHA-256: 81b9687ce4a17cec8f1a27a02588a5fbd040be6e102e1423a40752b641e9f92d