Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fa980183e18184…

MALICIOUS

PDF

91.8 KB Created: 2021-03-20 03:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4c363d522fb25ce654fbc4f59508e94b SHA-1: f1bfaa681a7ba94587095452a5d531517ebe2ebf SHA-256: 05fa980183e18184a3a4008fb413aebea45b2f8a4d7477fe0d0105174a0ec686
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=where+does+like+water+for+chocolate+take+place PDF link annotation
    • http://tumbaa.space/composition_of_functions_worksheet_answers_kuta_softwarexd3ia.pdfIn PDF document text
    • https://cdn.sqhk.co/gobejilu/ikkjaRF/farakutavasuxezosarefuvo.pdfIn PDF document text
    • http://shop-profildoors.ru/swot_analysis_sinhalax2lg4.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/iicfrij/sunday_school_christmas_songs_for_preschoolers.pdfIn PDF document text
    • http://fitokapss.xyz/pepogirelifojamejv4ba6.pdfIn PDF document text
    • http://all-system7.club/66087893877ne8nb.pdfIn PDF document text
    • http://keepxufi.space/fubowoxetivulovawgio0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_45d53836243e42dc8363458011c48b89.pdf?index=trueIn PDF document text
    • https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_b20c73a97ca949128a5703b55b6fd513.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/58299403189.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/vce_file_player_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/fupud.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/cheri_cheri_lady_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/pefosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dacf80c-c92b-4e2e-938d-d846275201d5/55203583061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d6f058-b10f-4830-ab09-10a7f7c39ee2/cuantos_libros_apocrifos_existen_y_cuales_son.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_b733f4d7458e4517a9d469c8a0779439.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_747fde054a6b440d90f6d02c871b1c70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/languidece_significado_economia.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_78ca76831b0c4d539c0ef3e1fc8b08e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebomedug/how_to_become_a_network_security_specialist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da4c74c-c44a-40d4-b587-b0d495126e82/john_deere_48_mower_deck_parts.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7C 5412 bytes
SHA-256: d5b81d7a3145f64211e8a9f86b99c360ead4fb6e0a5d441c1fb9a600b8a037aa
font_01_sfnt_off000120ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FF 11680 bytes
SHA-256: 83c397af13125410705d4db7cbc06c061a6813b1217dac996325a6812c70b7b9
font_02_sfnt_off000147a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A2 17264 bytes
SHA-256: 6eb923eb2cbd07fcc01912a8ef07592851c10605e85395fff8db992330da7a33

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