Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2c295e86d13ca2…

MALICIOUS

PDF

73.8 KB Created: 2021-03-29 19:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0d951a1c4072aedcd1fe6507235b9db9 SHA-1: 6f0f9751a760a8a0225e67159a97864293ae70ba SHA-256: 1f2c295e86d13ca2d10f4050d23de41a974a5a4cf7920364428ee6bbebe3267e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in SEO poisoning or phishing campaigns to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to facilitate the download or redirection to malicious content.

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://ponafet.ru/wix?keyword=american+vision+textbook+glencoe+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402706/normal_5ff3c4af1c72e.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/Gjbgjie/line_segment_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/xemuxebu/FicU2hQ/wixix.pdfIn PDF document text
    • https://cdn.sqhk.co/fidisutipamu/6vifAJs/66196523215.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/iibhhhb/feteruvepifajokobuvasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_5fe98dde5e3ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404287/normal_5fde6a82ebaf9.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/pozokimepe/89658667819.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/2014_brunello_vintage_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/13675600913.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/basic_geometry_crossword_puzzle_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f515152b-ae2c-4193-90a6-898fda1c9ed3/tepoporopaguwuletorogi.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/3665953587.pdfIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_280b8e763c824bcca77ea160645e4166.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/basic_english_speaking_sentences_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/kipadejenixazus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425a2f36-517e-4e19-91c1-00480f3b0e15/bagotadubibili.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_e590da4cb79f4b888a7404ea4d103d45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudefem/27389780886.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_off0000e080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE080 5796 bytes
SHA-256: 151fffb1e8a0ba1245a10647c8dac667670fb9dcd08b58a1ea913478349a7a25
font_01_sfnt_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 10744 bytes
SHA-256: 6969415f13d7abd0087a8dd80ce5f9910e2c40f42b70486b8367a95389cbe3b6

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