Malicious PDF — malware analysis report

Static analysis result for SHA-256 64240abe5085cd56…

MALICIOUS

PDF

75.7 KB Created: 2021-04-06 05:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1da65e8ebbae4aa4700e567314f495e0 SHA-1: 016510ab08fc274cd374ea4856b0c1946f6360c9 SHA-256: 64240abe5085cd5603901491ab8d79c39e02226c540294be56fa7013dcbc548b
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-themed and point to other PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary URLs, 'https://jumiwimov.ru/strik?utm_term=monitor+card%25C3%25ADaco+speedo+58010g0+manual', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=monitor+card%25C3%25ADaco+speedo+58010g0+manual PDF link annotation
    • https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/wuwowenuvuju.pdfIn PDF document text
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/8137684.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/cours_adjectif_qualificatif.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/39881640744.pdfIn PDF document text
    • https://fenipedixov.weebly.com/uploads/1/3/5/3/135385823/kotixajarataji-zojogebof-nabegoro.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/riwokuge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495974/normal_5fcc98c16bbf0.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/51547123970.pdfIn PDF document text
    • https://mifabawir.weebly.com/uploads/1/3/0/7/130776047/ec0a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_60562d438f161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/birds_eye_maple_veneer_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/siximitolimogoza.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/455477002.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/effortless_english_full_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/desumop.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/39932565314.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/kinds_of_sentences_worksheets_for_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/indies_pharma_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/gymnopedie_erik_satie_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/75408408008.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/powuguv.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/tangledeep_starter_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A2 5844 bytes
SHA-256: 6a1eb00fceae74fd60abb152de1af80e43f0985c4e951a3122b8fe7cfd8d6b64
font_01_sfnt_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 14188 bytes
SHA-256: 5d0ec111f1dcd2f5850107c22abf13e65fdd152df1517133538088a2c30d5a6c
font_02_sfnt_off00011107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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