Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d050e5c7c0c25d0…

MALICIOUS

PDF

82.7 KB Created: 2021-05-25 04:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5d9493a57608bca3bf3f24306b0ed800 SHA-1: 2cfbe77531b6df8b062b4630686814ad21cbb482 SHA-256: 8d050e5c7c0c25d0a5d4ab10d62bfbe27ca6f1090bd3a23487574ac07fa5b686
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://xajibur.ru/strik?utm_term=how+to+cancel+ei+report+online', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, contains text related to 'How to cancel ei report online', suggesting a lure to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/strik?utm_term=how+to+cancel+ei+report+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fdd3250c098d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_6050e7be1cded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_6012bc6ac8f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5fd5efdf77d6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fe4d57be0adc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_604047b0a91db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498702/normal_603aa3d4aa34e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_600d41c25701f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_601106636716b.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/bulalowisu/96506166380.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/hoover_steamvac_silver_carpet_cleaner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/cabinet_ministers_of_india_2019_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/decision_tree_python_code_from_scratch_github.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/modofixebefosobififapumep.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/linux_basics_for_hackers_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/black_wallpaper_4k.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_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 4804 bytes
SHA-256: 19e1536a3db4091b903d0f286716da7d3835e3be24f569eb214685a0b167b1bb
font_01_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 11916 bytes
SHA-256: 9b1d9a0297b3e1643a0ff81b34273c7fa4afa1d5d7a16e464be0c4113f253182

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