Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89bdc31ef200ecc…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 18:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04006a7bfcecdc6a83281ff28c7b2a63 SHA-1: abe4e55318329333184af82cc4bb184e19bcf86f SHA-256: b89bdc31ef200ecc164f3b6b8dce04ff46d98cf368c1e839177ccbd39409aa70
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms or disposable hosting. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/uplcv?utm_term=reproductor+mp3+android+gratis+sin+publicidad PDF link annotation
    • http://www.naraihillgolf.com/admin/userfiles/file/jelejixaposuvowotazad.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/59423530233.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370bb87cd86---52350029746.pdfIn PDF document text
    • http://rockbond-aac.com/id-admin/fckImages/file/zevemigifuguwagixajota.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/16288420510.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/nolegagolu.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/34254585469.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/vizenebemixilukak.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rdhaaiegcqjr09pvvtnts7fa84/36829113925.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16133572a3c748---21545868666.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/faxabipuper.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/xoravokijo.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/75643236897.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/25750346252.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/tonebasat.pdfIn PDF document text
    • http://osayit.com/images/file/zulekewewisirunatuzido.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/73446304281.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/64541466847.pdfIn PDF document text
    • http://laduses.nl/image/file/laraseru.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/fuvazanopazo.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/fijegoleza.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/nizukigenugukaloviwosod.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/penogiwazubuvazi.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/samowapaxavasadujujetu.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/67405107021.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/waxajajupidixovisipu.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_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 11316 bytes
SHA-256: 9befe4568d6cee941852f8ad31a429f8deba73dd81c1ae0b1ff1e26e7b09adf1
font_01_sfnt_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 18208 bytes
SHA-256: 8f696d0ce3c7103d4cf2dbad5f1f9e96bb50b8e95cf602c9a5475ac665ad2c5c
font_02_sfnt_off000125d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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