Malicious PDF — malware analysis report

Static analysis result for SHA-256 1865e1ae689c333c…

MALICIOUS

PDF

47.6 KB Created: 2020-10-31 20:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 590a1df6ea25c80ab3c92b54d299e400 SHA-1: d826735cbf2eb6d62745c596069004fe35eb4adc SHA-256: 1865e1ae689c333c2997f0f0dd6aabe569d6efd0351d5260b295156c6992dc14
94 Risk Score

Malware Insights

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

The PDF contains a link to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=jacob%2527s+ladder+electricity+explained In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5f94cad4a1ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f94b3a88cd76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f8e73b3efc87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f8a9991b87c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f96bdd11b85d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f9913c13b4b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f961ad848a16.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/sakaburepagase/disejulewazuridujef.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/delhi_metro_map_download_latest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db32c568-e209-49c9-bd60-b6e062fbd7b7/67852775322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6a74cc-2383-47c1-a7ae-07321d9b33e0/vugupojevisisekiwexin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce94eb7-a970-4d10-92a4-aedb1b50575e/43762585610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d364babe-c9f2-409a-9983-bc4baeea9150/6328415192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c22299-f631-46e2-9c7e-68d7cc235af4/rilalinufigomon.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_off000079b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 5400 bytes
SHA-256: 9c6655af30b39998a9fd689a9ed5557df87ede5b7af3898f00d1eac9d8418e9d
font_01_sfnt_off00008c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C27 10788 bytes
SHA-256: 0bd1e19f1ca389424bf62a46339bad7ca939de7a8edda44385dd2ef62619dcad