Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46117f92336ae86…

MALICIOUS

PDF

68.1 KB Created: 2020-11-13 07:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce0c8679e4973e2d64da076bdd0d4767 SHA-1: 1c666102083f5ed1867237503e48c409932aa88e SHA-256: e46117f92336ae865c85704b7a6912d7b116ed36d5d1aac98d2f8edb282e14dc
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malicious content. While no scripts were explicitly extracted, the PDF structure and URL analysis suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=android+sdk+avd+manager+command+line
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/3321595.pdf
    • https://rixemeja.weebly.com/uploads/1/3/4/7/134711448/famuwenopepal.pdf
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/9710696.pdf
    • https://jugusunoju.weebly.com/uploads/1/3/4/6/134625161/ffb43976de1.pdf
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/7387652.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavitokolezub/digestion_y_absorcion_de_carbohidratos_bioquimica.pdf
    • https://s3.amazonaws.com/nuselufuzo/xasilixiwuzuga.pdf
    • https://s3.amazonaws.com/mipizaju/mumikolub.pdf
    • https://s3.amazonaws.com/metubevozisul/borapagumogizizarojejetam.pdf
    • https://s3.amazonaws.com/zobuwubedak/the_bold_italic_instagram.pdf
    • https://s3.amazonaws.com/tubupejevomo/2455011485.pdf
    • https://s3.amazonaws.com/mudurixo/esaurimento_nervoso_in_inglese.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c62d.bin
55dd78c4d5f85e6e6b04afdd0c18402219ec3023eeffbb93b88a02c99ae9c0f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC62D 5372 bytes
font_01_sfnt_off0000d868.bin
2bab92d23038d99bcb63a463457d1566b67f20040ee8a68f943924d42b35f5a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 13544 bytes