Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bae644b1beccc18…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 20:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 35151625cdf97ff5ab9f4adb12b67c76 SHA-1: b73680d2f61d8f4f8517adb5533a5116ebaa3390 SHA-256: 5bae644b1beccc18ebd23448f2fca335edabc354fd0f7cbb188d7dd979c6d090
156 Risk Score

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 0.9996

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 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://xezojetit.ru/strik?utm_term=tai+chi+movements+names PDF link annotation
    • http://wowmarket.info/name_game_song_lyrics_american_horror_storylsk1a.pdfIn PDF document text
    • https://zamikife.weebly.com/uploads/1/3/1/6/131606416/masavosamajim.pdfIn PDF document text
    • http://healthyforczechrepublic.site/dijeporavesijafe2u1zj.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/jhjihmU/lofabugar.pdfIn PDF document text
    • http://mmeueue.space/bureau_of_internal_revenue_form_23076f13p.pdfIn PDF document text
    • https://cdn.sqhk.co/razulati/gxnhef7/kaxonusekalejufaxikibofi.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/zuletawugojowi.pdfIn PDF document text
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/fea03.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/film_for_polaroid_sx-70_land_camera_alpha_1xl043.pdfIn PDF document text
    • http://gsmall.space/67802357397i71dh.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/defujo/yahoo_games_chess_free.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_f7168ddfd0024f6d85daa924103958cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/41185081201.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/sekibokatuk.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/slouching_towards_bethlehem.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/tanki_railgun_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/husqvarna_rz4623_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/52330933340.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/ardaas_karan_full_movie_mr_jatt.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_bb07400f26894c3eb43d7fb65b5ae4b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugumeb/bose_soundlink_revolve_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/how_to_link_honeywell_thermostat_to_wifi.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_off0000f85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85E 4920 bytes
SHA-256: 560419af9d62ec7120ff06a220a2c6cc5ac231a02c50542fcfefa030bab410ed
font_01_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 10524 bytes
SHA-256: 8fcc6a3eaf32fdc11f73a1a292dbab879f19caa90df178d05230747702df605f

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