Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d55d5f0a2b7d4bd…

MALICIOUS

PDF

79.7 KB Created: 2021-02-04 21:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e1d8ceceee1bfe8c675e9d00bd14fae3 SHA-1: d19084c0d9504b255260e4275c64360b4aa0152b SHA-256: 4d55d5f0a2b7d4bd3f6b64e288339e44df8802c533aa0966b5ac6b14d8cbac90
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to suspicious domains, with one specifically disguised as a lab report. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple suspicious URLs suggests an attempt to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://crophysi.ru/wb?keyword=bernoulli In PDF document text
    • http://ourfutures.space/pukapaxunutofznz3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5ffbc659b3534.pdfIn PDF document text
    • http://erogan-columbia.site/91830885018t850x.pdfIn PDF document text
    • https://jonozexogu.weebly.com/uploads/1/3/4/3/134357932/eedc7b0dae5b9c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5ff804141af03.pdfIn PDF document text
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/numawavegitizarat.pdfIn PDF document text
    • http://galoomer.online/wupoboduzujekowew4uq70.pdfIn PDF document text
    • http://circleshtang.xyz/ginanoysbbn.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/CihSPnN/gawegumikota.pdfIn PDF document text
    • https://wadodimimilupe.weebly.com/uploads/1/3/0/8/130873890/balekewuka-nuriwisagotigar-dujonejomuxej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_60019efc03ae4.pdfIn PDF document text
    • http://loginwithfb.site/lagegotofijirotvh6n9.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/neliwonoxaret_tubutefawanej_valimekew_noditiru.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/firudegix/pawaladesuzasirofiviruk.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/pierre_bourdieu_biography.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_off0000eeed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEED 3040 bytes
SHA-256: d18bf7dae707edd270d49ff584c062b2c080a0b9d12e5b9aa53c0ca1401957b9
font_01_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 5256 bytes
SHA-256: 8bd52c59ce8cd69f925bb715158ef6f255de3f595e0f42078ccc3a5eb9608910
font_02_sfnt_off00010ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 11020 bytes
SHA-256: ad4c0e7c467622756e74c4a6119766cde472309477c61d48b0b838f7a365f2e3

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