Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c9f4430215ff9a…

MALICIOUS

PDF

75.5 KB Created: 2021-09-17 04:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6eccc10d9920ee87d5e5876a1fc894b5 SHA-1: 4762fa443c9be014d1c4d5a7bb450fd6021858d1 SHA-256: e5c9f4430215ff9a2b94312b5842b7a3eae6a7aa283bdec4c1f24f184e80e181
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm, a common tactic for phishing or distributing further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high number of distinct, low-reputation domains strongly suggest malicious intent. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://e-hematologica.com/users/file/58968014722.pdf In PDF document text
    • http://oskarmak.com/userfiles/file/gabitenaturofo.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/19976708529.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/93544231174.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/12701563871.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/kimexabokoju.pdfIn PDF document text
    • http://www.ezmoving.com/file/dewaken.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/ragokugixape.pdfIn PDF document text
    • http://t-cso.com/upload/file_folder/file/lotijolupiloroju.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/gotuxenasutotepewepajos.pdfIn PDF document text
    • https://www.informacion-indoorclub.com/boletines/img/file/zosabavizoramagimedifip.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/56437534941.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/49305100682.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/kobafojipobatokowumomudu.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/zaziwilenerabomiroso.pdfIn PDF document text
    • https://lesura.net/userfiles/file/32942255633.pdfIn PDF document text
    • https://novsport.com/content/File/vaxafa.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/poposekoxodi.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/63373714545.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/sttbqgqb4unrf0lac0i44hmke2/92626990268.pdfIn PDF document text
    • http://ropesadventure.com/d/files/dodonumanakomuvekovi.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/73196500355.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/texunub.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/kitisemofoj.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a0f49263ddfa88276ceb31867694d763/83456922972.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=and+i+praise+you+lord+you+are+my+strength+and+my+reward+lyricsPDF link annotation
    • 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_off0000bff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF3 11240 bytes
SHA-256: 60004ffabe75ec3e2a3f876ee066e73093ce0f37017b21ef92f950f6c149f281
font_01_sfnt_off0000da07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 17392 bytes
SHA-256: ae45a64feecd9e076230b30f867fd0b152c807127f22e0a3d965deb0897d5683

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