Malicious PDF — malware analysis report

Static analysis result for SHA-256 6046fd77c90a93b5…

MALICIOUS

PDF

67.8 KB Created: 2020-12-04 05:02:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6405a398f3d024e0db5d829063cbae2c SHA-1: 287a71ec493d492dc008602ccecf66308458294c SHA-256: 6046fd77c90a93b5d731be90c4ea8c4feca69193f673c96bc3759f3b174ba769
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and another part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=relationship+between+race+and+social+class In PDF document text
    • https://xoxamotanu.weebly.com/uploads/1/3/4/6/134653835/02e2572924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fa83b774639e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_5fb021737738d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496402/normal_5fc835a11ba1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5fa12d78740ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5fba0e2b7ccfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5f990ef3f3eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482882/normal_5fb516e9c2325.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixanarer/likufimem.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/86980939343.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_off0000cc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3D 5400 bytes
SHA-256: 0eb64fa8df000cb6e1459972b1252a696c37889409c82a5b0f113237a3a9532f
font_01_sfnt_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 10548 bytes
SHA-256: c752d31075f6fe0248485552c1c38781a0e989e6fce51bf91e005ccb4902c7b5

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