Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed2e1dcf856c519…

MALICIOUS

PDF

87.7 KB Created: 2021-06-30 18:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2234a3ea92309a9ee08e568af76c3be0 SHA-1: 8ce2600033c07403232d4018d8d0daf06081302c SHA-256: 1ed2e1dcf856c5191dcd96b4dc6fb2992b9f870ba5647ef91d51adc2f91892c1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://beloezoloto.ru/userfiles/file/wuwotasotuwufalelimakuwa.pdf In PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/2tlg0vgi4lb184cg40i54msb18/tibadegitomidanafibelad.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700fe26a509---21818593658.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/wowodode.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/10edd47305bd635d80cafb1b16e32333/wetapisowerajavoxoded.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/jomera.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/31qnv1r7bjclg4ivrlhhkqbcqk/vomosumabigok.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160842773aaad5---53481092735.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bc55d8cfa---pemagofi.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0fc5e9f69---35786129261.pdfIn PDF document text
    • https://mfdesign.hu/files/file/gikupape.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0c6e196f---gujokagojitidax.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/maginetunukuputawu.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/5c9lv0o8httafi108pjtfk0e56/sepojevipawerodul.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/96715fc254aa5c95622c26e919a905a4/daxelasarupexuroxik.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1608af6d4c7b4d---vuzotivaluxamutedokugax.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/24748309614.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf610f98f---31498464167.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/2kkds40bns1hmioet3l8iag44m/24537230900.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70b5ddd419---gopukujadotewuvebexedodo.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/6695865865.pdfIn PDF document text
    • https://ijp2.com/contents//files/wulujogibejerejevafe.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/lafebogudoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=new+movies+2020+hollywoodPDF 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_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 17368 bytes
SHA-256: 77853169bb5e9096c7d39fd39c15369de1fc7d3bb540ef1d55255291649c3c5e
font_01_sfnt_off00011fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCD 10536 bytes
SHA-256: cb249a54b1c9e2778260c4871cc54852d3f149d6ab147987ecf0f9ca889dbb40
font_02_sfnt_off000137e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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