Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25991a50899339b…

MALICIOUS

PDF

69.3 KB Created: 2021-03-10 03:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a3d9826077b3d60257bc762c61a006b8 SHA-1: 92d34f18bbe730a249a678b9fa29bed7b646637e SHA-256: c25991a50899339b00f8ad786cc2ca5f2650c40690a90476ffce0a2f14bd7e10
186 Risk Score

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, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The embedded URL `https://soxebez.ru/wix?keyword=download+csr+racing+mod+apk` indicates a lure related to downloading a modified application.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wix?keyword=download+csr+racing+mod+apk PDF link annotation
    • https://cdn.sqhk.co/kewesowovim/jaFhcZ1/waves_guitar_tuner.pdfIn PDF document text
    • https://kenitavujene.weebly.com/uploads/1/3/5/9/135977886/wenabafedijinulukora.pdfIn PDF document text
    • http://dutusejutax.22web.org/26838434678.pdfIn PDF document text
    • https://vevilatibivu.weebly.com/uploads/1/3/6/0/136082609/56cd64.pdfIn PDF document text
    • https://varigero.weebly.com/uploads/1/3/4/4/134443598/nipuwikufub.pdfIn PDF document text
    • https://gosikemimikivum.weebly.com/uploads/1/3/4/6/134674661/eea58284a.pdfIn PDF document text
    • https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/f2dcea12f57de.pdfIn PDF document text
    • http://kojovud.iblogger.org/zlatan_bolanle_video_mp4.pdfIn PDF document text
    • https://xunasumip.weebly.com/uploads/1/3/2/6/132696393/gowiranedamipil.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/egd9Gjg/my_talking_angela_apk_unlimited_money.pdfIn PDF document text
    • https://sazaburesifug.weebly.com/uploads/1/3/4/2/134265765/1124306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gudenojotu.epizy.com/automatize_tarefas_maantes_com_python.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_f0947c59b23f42e7afa4d1619887fd1a.pdf?index=trueIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_06ab2636b8b44e94b98c2da2510655c6.pdf?index=trueIn PDF document text
    • http://jitawalidi.epizy.com/94801595353.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_c563b1a4abc4457b94160b0a9145665e.pdf?index=trueIn 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_off0000d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 5548 bytes
SHA-256: 4e5e1d958305ca5bcaad8e01c6d0422a087f438fcd0311a7d2c58637f14d0963
font_01_sfnt_off0000e37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37C 10824 bytes
SHA-256: 14366b724a77e268fc9576b39b3ff269db2ff6fb52f6e1c470515153a33258d9

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