Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05388611a34f189…

MALICIOUS

PDF

72.2 KB Created: 2021-04-22 10:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b88d713a111e3e0f79fde491d485f6be SHA-1: 70ab5fe2d677bbea93b889058a5f6423f46ab890 SHA-256: c05388611a34f18925ee7cb8328275afa270dff468d1a5a019edce133cf2b474
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL disguised as information about snowblower parts. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF_URI heuristic points to a malicious URL, suggesting the document's primary purpose is to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=simplicity+1226l+snowblower+parts PDF link annotation
    • https://cdn.sqhk.co/rujiwujik/dih3jbl/61532980798.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/savamazokudavetojom.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwokujuwe/hGhhiaL/23233093571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_60136251b3d96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447101/normal_5fe0e070959be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_602c6e98b8ec4.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/wujapu/26300599567.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/big_bus_abu_dhabi_map.pdfIn PDF document text
    • http://tokozod.myartsonline.com/python_3_programming_language.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/causes_and_effects_of_noise_pollution.pdfIn PDF document text
    • http://jukasuxoseki.atwebpages.com/suxigexojaloxosojorepaje.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/will_the_gre_be_cancelled.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/jivigekitepovibiseka.pdfIn PDF document text
    • http://situwosase.myartsonline.com/xidasizodinumurif.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/gisaruwawuxaxifamepavozus.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/character_letter_for_child_custody_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/action_jackson_trailer.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_off0000dbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD0 5852 bytes
SHA-256: 8e5e37ef769687b22364730fa0aa395443ed1b560c43aa28e4a1ea722d80f08f
font_01_sfnt_off0000efbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 10668 bytes
SHA-256: c9c9b0e1da21e8a718b19ebcb4b23e7ba5aea6115bb3da543f7656101d64bf3a

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