Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaaebf06b6a9e36…

MALICIOUS

PDF

66.0 KB Created: 2021-02-14 20:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 75396c69bbe6015230edade024b66849 SHA-1: b9e5f2644a2ebc3927a74f8e54e0fc5c81a93eea SHA-256: ddaaebf06b6a9e36f601130a948625894150bca929d5e5edf786b5204648fe68
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to 'seumenha.ru'. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan variant. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially harmful content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/aws?utm_term=properties+of+ionic+and+covalent+compounds+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5fe632f23cda2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383304/normal_5fdea1c169673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427094/normal_6009648e9fcf4.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/arihije/13165458148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fe15f7d9ebcc.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/6e4b1581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371783/normal_5ffe828c4e7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_600a6cd50a38f.pdfIn PDF document text
    • http://kafalogu.22web.org/61503605793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372383/normal_5ff280ec906f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoxepilazif.rf.gd/63132507482.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/car_body_inspection_checklist_template.pdfIn PDF document text
    • http://mosiwifu.epizy.com/the_hunger_games_series_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/galvanised_steel_sheet_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/wofek.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/90692182088.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_off0000c196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC196 5612 bytes
SHA-256: 307ecaa4f27016f6249fe858ca70f6a276b5bf42746f51a8213a463adf30b151
font_01_sfnt_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 10512 bytes
SHA-256: e9f556fe1a21c673fed4fcb2d6ee39bac52de4c5cd05a644ea6fd2236ba70c53

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