Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e65990ad9720ba…

MALICIOUS

PDF

74.0 KB Created: 2020-12-20 15:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9941f04e3be77f200d9e5b9e849fac91 SHA-1: bf1e2ad29ffddf750309b7b923ba719d983c9f34 SHA-256: e6e65990ad9720bade0c2c46f3db79620e251bcbd17b4c378631d12640e6a8d6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URL pointing to "https://trafffe.ru/123?utm_term=phylogenetic+species+concept+limitations", which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to scientific concepts to mask the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=phylogenetic+species+concept+limitations PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5fc1c9d147ffc.pdfIn PDF document text
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/fizasa.pdfIn PDF document text
    • https://domamulobam.weebly.com/uploads/1/3/4/5/134527142/9415acc013913bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f8bc72a2ebfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5d0b7ee8e70759ddae0/1606219216960/rear_window_louvers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc187916609fd0ee795caa4/t/5fcac4289d30902cb76be9f9/1607124015872/zipakafisalerukisoposen.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/xapifisiwewusinagesisuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/51517392301.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/bosagafukan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf4895db6f322e656e3e16/t/5fd670b2313c42342b8f5873/1607889074892/htmlwebpackplugin_template_scripts.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_off0000e757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE757 5352 bytes
SHA-256: d14c9927981418660bbb1020ab740394d64e037052c7c1e97534ea92556ebbe9
font_01_sfnt_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 10012 bytes
SHA-256: e74c6b538a8cdcdb79b77494176a1ec3407d08cb852aa21c006cd507e2aa232f