Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba6648fefcc9bf1…

MALICIOUS

PDF

72.7 KB Created: 2020-12-18 19:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3d7063f6d3bcac24eb78a78144e71c17 SHA-1: b1a8c9363c1dedaa5c29721dd950f0b479623269 SHA-256: 9ba6648fefcc9bf149b8df5162158a8959bfb04ee86e0d33167edb35917343ca
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing attempt. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm designed to obscure malicious destinations. The primary malicious URL identified is 'https://trafffi.ru/strik?utm_term=ulta+dress+code+colors', which is likely used to redirect users to a phishing or scam page. No scripts were extracted, but the PDF structure and link farm indicate a phishing attack.

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://trafffi.ru/strik?utm_term=ulta+dress+code+colors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5fa73294ee8bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_5fad8e0fc069f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478134/normal_5fc7c85a8be4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_5fa22e408e711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5fc761ac88892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_5fc32f9209894.pdfIn PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/9180125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_5fbabf1ac95a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8d8ae9e3-5eaa-4d6e-8cc9-a7caae4eb128/wreck_it_ralph_2_full_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b03915-af92-4132-b854-6849f4889a0f/bepovewe.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/allen_bradley_powerflex_40_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48851b79-0818-4cf5-b50b-a2b0f5f57a46/nuvaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0438aec-d249-425d-a0d1-c9008f9f2a05/38723042025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a27417f-4bdf-4cd3-8c92-3a63f4a34b69/the_red_convertible_symbolism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffd2792-ed41-4d57-a425-8c7de89be3c2/kewidowagevi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52B 4560 bytes
SHA-256: 5182dab590f79434fd6a4010a6d26f66603128ee2c06ea91a889a50bd217fc33
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 10324 bytes
SHA-256: c33cf002e79c667230fe01c7c2431d06457661b827282c0ee1f782dd05bd6ee2
font_02_sfnt_off000107fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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