Malicious PDF — malware analysis report

Static analysis result for SHA-256 0381e2367a41e160…

MALICIOUS

PDF

72.4 KB Created: 2021-02-13 18:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 594c24e124715311a0482cc43f040408 SHA-1: d777df92215a106945c51c2ab22eaced936a6d00 SHA-256: 0381e2367a41e160440638770efccd197d9b40c941103773279c75775e9fa3f8
154 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, and it contains embedded URLs pointing to known malicious redirectors. The primary URL, 'https://yafferge.ru/123?utm_term=our+iceberg+is+melting+summary', is flagged as a malicious redirector. This suggests the PDF is designed to lure users into clicking the link, leading them to a potentially harmful site.

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
  • 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.
  • 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://yafferge.ru/123?utm_term=our+iceberg+is+melting+summary In PDF document text
    • https://duzezefoge.weebly.com/uploads/1/3/1/4/131437668/8516146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454691/normal_5fcbf0f31a789.pdfIn PDF document text
    • http://robot3.site/broadcastreceiver_in_android_example_stackoverflowo4027.pdfIn PDF document text
    • http://sberin.xyz/capitalization_worksheets_4th_gradeb7iwu.pdfIn PDF document text
    • http://korecos.ru/23458855516e509c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422163/normal_600025a5318b1.pdfIn PDF document text
    • https://nagofojog.weebly.com/uploads/1/3/4/5/134586362/9643ba88b3ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_601a5703876f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5ff9594985f90.pdfIn PDF document text
    • http://nukels.xyz/absite_surgery_review_freedfzr6.pdfIn PDF document text
    • http://dkblogin-de.com/47760098612yqqq1.pdfIn PDF document text
    • http://distornyup.site/circle_of_life_choralcw108.pdfIn PDF document text
    • https://gimimelaxagoke.weebly.com/uploads/1/3/2/7/132740951/7d3f6596.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/catalan_independence_bidtofo5.pdfIn PDF document text
    • http://swiss-gear.store/fawisejevdfmi.pdfIn PDF document text
    • http://chatik85939775.fun/mitazalumepeluxiko8ebby.pdfIn PDF document text
    • http://womenita.fun/identity_v_cowboy_guidelagnf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5fe0a7af341c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 5388 bytes
SHA-256: 7952e906b894f365e0cd6da9953b73ff151206369252e1ce4e629d9c5b6c505f
font_01_sfnt_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 11280 bytes
SHA-256: 64fb260f7d84c7e0176c9fa7fe1ce0f6a2ff38204a1781b8b3201d54b57fb85a

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