Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecd2df7f21e6525…

MALICIOUS

PDF

61.9 KB Created: 2020-12-11 06:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cd23c6a955a575057ffadb1778a9ed4 SHA-1: 74516a2c82b452c4f59b2e55eb8912b3fb82c46b SHA-256: eecd2df7f21e6525a1ffaebd53630b335cf1656fdd021b682c62b3a5dcd3bf74
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites like 'trafffe.ru'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?utm_term=alpha+sport+carseat
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/gedetu.pdf
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/d8d89b093.pdf
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/xutubilod_binapajezak_kowud_darixezejawuv.pdf
    • https://vekatugid.weebly.com/uploads/1/3/4/5/134592715/famusenobefiv-vedudavixovi-latibewir.pdf
    • https://webapifupa.weebly.com/uploads/1/3/4/7/134706955/f3cb24492b2e8.pdf
    • https://gukusabijimesop.weebly.com/uploads/1/3/4/7/134761354/buniruti-kipudojunuge-xaxojazalilufuf-vovuvonefu.pdf
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/rofexa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/750fa113-adb7-4d25-8cb2-a157489eba4a/sports_illustrated.pdf
    • https://uploads.strikinglycdn.com/files/060d3663-9a2d-4b18-a734-f46fe05e1188/jofamivagukawafu.pdf
    • https://uploads.strikinglycdn.com/files/462a09d7-3db4-441d-bcf6-3f43fe57aa88/xabubemum.pdf
    • https://uploads.strikinglycdn.com/files/59d7ac3a-de11-4b44-ba39-8347dd7377f0/wizajijanulogela.pdf
    • https://static1.squarespace.com/static/5fc0e2c57848ba205d187778/t/5fc1525e9b1ed035380d0816/1606505059435/discipline_with_dignity_in_the_classroom.pdf
    • https://s3.amazonaws.com/jaxesabi/buwowovadefojejesopi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abe0.bin
7b613f8ab329943117aaf9f9b0d71072dee4da0aceef7fd20bc384ec7f591737		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABE0 4644 bytes
font_01_sfnt_off0000bbab.bin
7d3cf4a16d82a27c8e07540cd33fce9187ba16377089a2c12b3e3efc7ec5a5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAB 9816 bytes
font_02_sfnt_off0000dd2c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.