Malicious PDF — malware analysis report

Static analysis result for SHA-256 c773104789a51228…

MALICIOUS

PDF

78.9 KB Created: 2021-03-07 09:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: fa72ab39db1ce924608ce4dd8e1d6cb5 SHA-1: bc1f3e9a46dc2f0cca15ad4e4528996bfade0792 SHA-256: c773104789a512280aec63eb6e752f6a8dbbf4d5b4031b7a47c60a3b483e9645
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://nipisod.ru/strik?utm_term=final+fantasy+7+remake+part+2+on+ps5', is flagged as unknown reputation and is likely the intended destination for malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=final+fantasy+7+remake+part+2+on+ps5 PDF link annotation
    • https://wovokuvodopi.weebly.com/uploads/1/3/4/6/134685597/9759182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444377/normal_5fe16f6eb5567.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/xewixasixumozixedak.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/l0MVhfG/mobile_patrol_henderson_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/hjeccOa/jegasenu.pdfIn PDF document text
    • https://keninowe.weebly.com/uploads/1/3/4/6/134617270/fimodikesiri-fajuzugaru-kokerudetexikop-minag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_603b3a02eac6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455180/normal_601d4fd699ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_600f35d339f46.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/gfginid/kuxora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_601bb5f991e1d.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/b202503dea00f.pdfIn PDF document text
    • https://kabijibijeg.weebly.com/uploads/1/3/4/9/134900291/buwuwe_lonujedebe_sigijonelod.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/5bef37226b8.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/fomudebipefasu/gamevapisiguwadujeba.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/does_netflix_have_too_big_to_fail.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/24439187387.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/87317560609.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/autotype_exposure_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/ginokimuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/vafobaxebuzuzolejeva.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/business_card_vector_design_free.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_off0000f5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 5504 bytes
SHA-256: 9ec41f1c14429545c36240394eede9fc091786bd8f6140c1a321ff8cf8be9731
font_01_sfnt_off0001089e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 11008 bytes
SHA-256: 57dc3db2c857334396a050fdc3ebe2cecf1178ab5f25ea47db6f662ce5163e63

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