Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde520cd748c8425…

MALICIOUS

PDF

51.4 KB Created: 2020-11-04 10:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 833fbf67b87562a421bc523a5fa6b4a3 SHA-1: e253b1ce4de76d5d36d0e1f9597cea990d843b43 SHA-256: cde520cd748c8425174138be262bd1294dd6a1ef792449e38140107958feec58
102 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body also contains the same URL, suggesting an attempt to lure the user into clicking it. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?keyword=ib+gpa+conversion In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f8829da9fe7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f897a7656e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5f99255094ff4.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/3117058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f9ab99bbc08f.pdfIn PDF document text
    • https://xafarapodekil.weebly.com/uploads/1/3/4/3/134369556/1259796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4873/7194/files/business_intelligence_manager_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/85863819176.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/73267933846.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/genulakejebisaluv.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/gixexivapunopo.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/kebepes.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_off00008668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 5208 bytes
SHA-256: cbab35cdca10f51cdde619edb19708b1038edd7d5476a8b3d311ad9ba934dad3
font_01_sfnt_off0000983b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983B 15008 bytes
SHA-256: 108fa2137c1fb3014732906a310b8ec1d062551a7d03d19e4ed6f3581f7ff269