Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf46eafe770aae1…

MALICIOUS

PDF

73.8 KB Created: 2021-02-14 22:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 38e636429f1161682094403f0930c8f7 SHA-1: d2ede5544ef8a05946344a68d5970a34d5c81bd6 SHA-256: fdf46eafe770aae121e9a0c903d0d408d666377952252561d1c951d1900e25aa
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 of which point to potentially malicious domains, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document is designed to drive traffic to these sites. While no scripts were explicitly extracted, the presence of numerous suspicious URLs and the ML classifier's high confidence score strongly suggest malicious intent, likely related to phishing or malware distribution.

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://jottigo.ru/wix?keyword=f%25C3%25A1bula+de+polifemo+y+galatea+resumen PDF link annotation
    • http://quickpapp.online/60381801430o4xdj.pdfIn PDF document text
    • http://veronaital.space/sopodecld7s.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/Ln0iavM/cruise_lines_from_new_york_to_bahamas.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/ghPQgjj/37375465286.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/fjfjigg/13175837250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_600ff28066292.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/oDoVhc3/66142858542.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/hg8iGgS/pefipajululipub.pdfIn PDF document text
    • https://lejujazu.weebly.com/uploads/1/3/5/3/135337057/bf9289c6e9b54.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/vedexajawo/tunevokedimusetof.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/retenonimofaxeluginizijas.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_off0000dfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 5792 bytes
SHA-256: 25a809c1b7d26b78e553c78913260328f9f5472f1631982109dbdcf3a0fcd1a5
font_01_sfnt_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 11548 bytes
SHA-256: 18fdd3607f0e1ffb081e11200fa5f1bed28fb5e90c2689b229e85b06b3019ff1

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