Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d1eafc2f70f5d8…

MALICIOUS

PDF

78.7 KB Created: 2021-04-18 05:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: baf9e0f3f6b87841f6ab63860f7310cf SHA-1: b39dc8da54988d456538024b4d381af17e604de7 SHA-256: 10d1eafc2f70f5d8f6425bc53c48cc8c9677247f7d7ac5168c2b9439efd97d8e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or a trojan. The embedded URLs suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=panasonic+lumix+dmc-sz7+charger+cable PDF link annotation
    • http://resimpub.com/nasawo7rek5.pdfIn PDF document text
    • http://workbykoder.xyz/70665360417vv2m1.pdfIn PDF document text
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/6200140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5ff2b48f0d156.pdfIn PDF document text
    • http://webmastervlad.ru/horizontal_axis_wind_turbinebanyx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_604f23e3e5506.pdfIn PDF document text
    • https://woxisuxifajise.weebly.com/uploads/1/3/5/4/135400236/5e38ec160.pdfIn PDF document text
    • https://futokodoneru.weebly.com/uploads/1/3/0/8/130814407/vozusiduliso.pdfIn PDF document text
    • http://remont-pc.website/clue_cells_in_urine_sediment8d5qr.pdfIn PDF document text
    • http://konufij.22web.org/tabel_99_asmaul_husna_beserta_artinya.pdfIn PDF document text
    • http://jawuzoruba.iblogger.org/samsung_bluetooth_headset_level_u_manual.pdfIn PDF document text
    • https://detabifaf.weebly.com/uploads/1/3/1/4/131436978/dagikutowubelu_lusuzevidovu_lidewobibubob.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/9566867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_6063b7c3e806e.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/kizugokofo/what_is_the_invoice_price_of_a_2019_toyota_camry.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/116962824.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/business_analyst_approach_document_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/chess_game_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/definition_galvanized_iron_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/34062134718.pdfIn PDF document text
    • http://repikigerudu.rf.gd/zikilemerisi.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/autocad_2010_electrical_symbols_library_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/performance_appraisal_overall_comments_examples.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_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 5528 bytes
SHA-256: 7e14a3499adee6fe8c83a39390372fabfc8b34ff5d53797da282744e117c30fe
font_01_sfnt_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 10588 bytes
SHA-256: 63ee2af6d968c0a1217bb9ee5cf7dad0ef59b163e5585089ebf0bdf870a345c9
font_02_sfnt_off00011f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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