Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea06f91f3109012…

MALICIOUS

PDF

75.7 KB Created: 2021-05-02 20:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ba731d432faa56805ba8b434420e3d48 SHA-1: edb5c6529e6bce82c65e5475886a4ab9ed50a4be SHA-256: 4ea06f91f3109012a5deb5a763942b501d301e008efcbd0a8e0b37de57111c01
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one pointing to 'mezovuduw.ru', which is indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to audio equipment setup, aiming to trick users into visiting the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=how+to+set+up+focusrite+2i2 PDF link annotation
    • http://padapup.iblogger.org/pofipejozuxadelogirolu.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/ihYhj95/1000_words_how_many_pages_1._5_spaced.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/ieiaBsn/word_blocks_game_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_60280b0845c0c.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/Ljj6xOt/79008062874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_6041835b89d85.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/ja3vggt/rolling_stones_magazine_covers_archive.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/fKifjjD/ruborito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_60170d4e1afbe.pdfIn PDF document text
    • https://sapurokegija.weebly.com/uploads/1/3/4/5/134577933/6aad3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_5fd03b6c87666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413843/normal_603456f786476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_6046f1d731004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_6024f4ed62ac9.pdfIn PDF document text
    • https://vilekelapufixev.weebly.com/uploads/1/3/4/5/134508089/gomow-wefamofom-xipexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biborufa.epizy.com/alodine_1001_datasheet.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_0a5c1435d67f453082b09e6072b3fb7a.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_2fecd1de076541608ba61d78ec74f509.pdf?index=trueIn PDF document text
    • http://xanosufamim.epizy.com/natural_logarithm_table_download.pdfIn PDF document text
    • http://jovifididapop.epizy.com/vox_chorus_platform.pdfIn PDF document text
    • http://suziwifu.rf.gd/template_powerpoint_mac_free.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_1eee2da0a91d45bc82e17deae63a968e.pdf?index=trueIn 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_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 4952 bytes
SHA-256: a0e3c36426dae4db2278dd3d5bf22e94822d86cea2ea2c7e5d9a4599da752865
font_01_sfnt_off0000fb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB90 11180 bytes
SHA-256: 383e29ed2e0bc035bcc4e7cea130c0188c725b33e15e7800dba6d43a8af0dad0

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