Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a6b961a8b5d9d3…

MALICIOUS

PDF

76.3 KB Created: 2021-01-31 22:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0029a1a28cacd59278327843e9192202 SHA-1: c1bc9e150dbb014819f79cdadad5111a7fa36cfb SHA-256: 56a6b961a8b5d9d335793f31295fe10e4db86fbe3d711bf50a57b2f939c4e732
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://maypoin.ru/123?utm_term=peoria+manual+high+school, suggests a phishing attempt or redirection to a malicious site. The document body, though heavily obfuscated, contains references to 'Peoria manual high school' and 'wkhtmltopdf', likely serving as a lure to trick users into visiting the linked URL. No scripts were extracted, but the presence of external URIs points to a download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=peoria+manual+high+school PDF link annotation
    • https://kofiserifopame.weebly.com/uploads/1/3/2/7/132741397/puzobojizetu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409413/normal_5ff9ff3c8dfba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381081/normal_5fcc3e2e5b188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5fceabf64ab95.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/6a7edf4866.pdfIn PDF document text
    • http://rmk4sale.xyz/isabel_allende_libro_paula4yysd.pdfIn PDF document text
    • http://naturagrush.space/ncert_chemistry_textbook_for_class_121dcjj.pdfIn PDF document text
    • https://xatefokagakutil.weebly.com/uploads/1/3/4/1/134108848/7197373.pdfIn PDF document text
    • http://frontglass.xyz/45279007952hxi7t.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/ggfc2id/zaxotuxup.pdfIn PDF document text
    • http://cardioactiveuficiale.site/pubozufufumixamafefis0y8in.pdfIn PDF document text
    • https://rajuputodetu.weebly.com/uploads/1/3/4/6/134682309/1902104.pdfIn PDF document text
    • http://itagreen.fun/chocolate_brownies_recipe_easy_philippines2216a.pdfIn PDF document text
    • http://brettlockhart.com/73607915876211le.pdfIn PDF document text
    • https://dunijolojuk.weebly.com/uploads/1/3/1/4/131437931/vozopojavog.pdfIn PDF document text
    • http://lisolu.org/manuxozaqkebl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5ff576849586a.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/jijari/27659263242.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/tetejuneto.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/lituwabajejuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/absolute_value_worksheets_doc.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_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 5216 bytes
SHA-256: 6f880261e0dab99396df459011fbe17aa0fe2912b2547d9626cc031f559ddacf
font_01_sfnt_off0000fcdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDD 11368 bytes
SHA-256: c2353b6f24cf86cb5a2820e3b5b45e1527b710aca9ac8f2b318a3198b471a58c

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