Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b6eff2f19799f1…

MALICIOUS

PDF

71.3 KB Created: 2021-03-20 03:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1cfb01af338438fa678e295a4ca40b5 SHA-1: 9c5dc355b0f169aa92168b7c7cb595063c141e7f SHA-256: f2b6eff2f19799f1d0600ee8feb9240465f7a4050a208b1f36f967befa9c54e4
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=kung+fu+panda+3+trailer+2016+official
    • https://xeromikivato.weebly.com/uploads/1/3/2/6/132695960/wuvupoge-xinakerek.pdf
    • https://cdn.sqhk.co/sozimelizak/c6Ohhaj/childcare_near_me_open_weekends.pdf
    • https://dalegoronatodul.weebly.com/uploads/1/3/4/3/134309481/tesoleperamoka-janudiliji-vebusu.pdf
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/vatipimivolop-biliwujuxuwod-rasegenibo-wonamonodupuruk.pdf
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/lepexozigemutopeguji.pdf
    • https://cdn.sqhk.co/vagekasip/itNaihw/ponutativuwuratesilamake.pdf
    • https://lopodegif.weebly.com/uploads/1/3/2/6/132695694/4617842.pdf
    • http://tejanexes.iblogger.org/78454533410.pdf
    • http://natgood.space/waruxewivajqbw.pdf
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/1167101.pdf
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/2735760.pdf
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/nogoruvo.pdf
    • https://cdn.sqhk.co/wosipuvetot/ahgojdO/mx_player_codec_armv7_neon_zip_file_download.pdf
    • https://kavirozix.weebly.com/uploads/1/3/3/9/133999962/mulofufixuxat.pdf
    • http://dominis.xyz/53971318506t9br4.pdf
    • http://medway24.com/23208243430bteeg.pdf
    • https://kuribigewisowe.weebly.com/uploads/1/3/4/6/134688213/640691.pdf
    • https://subafoxa.weebly.com/uploads/1/3/1/3/131379179/65d5bdba0a0.pdf
    • https://sisezapude.weebly.com/uploads/1/3/1/3/131398367/797d93203013.pdf
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/jaxotudugosa.pdf
    • https://musazejat.weebly.com/uploads/1/3/1/1/131164110/vusuze.pdf
    • http://vanlit.ru/livestock_research_for_rural_development_author_guidelinesbuz8f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mukadepokexow.epizy.com/31465812846.pdf
    • http://xigurig.rf.gd/24120421778.pdf
    • http://sufizewuwavibu.epizy.com/29839925716.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b8.bin
95accca8a948e997645779c0bf63da1c55e6e6ef29c2a47023ee23cfd3fc2985		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 5756 bytes
font_01_sfnt_off0000e976.bin
c3b55bb569b89c4f0ead78060d689d5d69b8644009fb0997deeb3b58d0a31555		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE976 10628 bytes

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