Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ed0c4f56a960f7…

MALICIOUS

PDF

75.2 KB Created: 2021-09-15 18:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d7f4a4ba1c529e338f608d0caebe4611 SHA-1: 5941fbec12c55078350362d719fec0101e52d20d SHA-256: 75ed0c4f56a960f74ab49054a0cb0270af98c65f36166db4e5655ef109008314
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9976

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://queure.ru/uplcv?utm_term=how+long+can+cooked+chicken+be+left+in+fridge PDF link annotation
    • https://ckmandarin.com/uploads/nodiwasosavif.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/xavofuluwimepagogiva.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/55242466487.pdfIn PDF document text
    • http://jarosi.hu/files/file/futorasutipelifivomejunub.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/solevimufutexowuvesuku.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/72652477664.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613d438b78147---50150557813.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/nonedizema.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/52310645290.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c727e59bb5---detavipisivizonurovagenor.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/20408493288.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/ronibufoxakolajidalovanid.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/9463738860.pdfIn PDF document text
    • http://adriennemason.com/assets/files/59905476020.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/godiwutufepugilile.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/77168963967.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/52319085239.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210913081001.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/53259968660.pdfIn PDF document text
    • http://gurgaontaxi.com/pa/trainstation/uploads/image/file/kotilanolefamejev.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/nekedeguloduxe.pdfIn PDF document text
    • http://snsi.jp/image/news_file/60082888324.pdfIn PDF document text
    • http://yingtailong.com/upload/file/2109010720197119942jssgssu1p4t.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://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_off0000c3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DC 10896 bytes
SHA-256: 07b9eee0fe11dabe233ef060f3608114c3a125382527af22d9df102826855019
font_01_sfnt_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 16528 bytes
SHA-256: 14cbfcff19016df598c44df02a3f679c22bf6a0f1245467b458606f5431ccdaf
font_02_sfnt_off000106af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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