Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1874307e64ff17…

MALICIOUS

PDF

72.4 KB Created: 2021-09-23 03:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cd41c4db7ac6edada629528b5b6937c9 SHA-1: 6a909c2be72227957ab32626a3261fc2f623d12c SHA-256: ed1874307e64ff17a7fff7123c3c0dd7e5133481b32c4b5bc0cd395a26cd8c98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, indicative of phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://laborke.ru/uplcv?utm_term=garena+free+fire+apk+download+for+android PDF link annotation
    • https://soechi.com/userfiles/file/bibaveg.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/37537078343.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/lusufaba.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/23129613246.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/fokegobom.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/75146111417.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/27672419360.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140901a11502---mivutiditupojax.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/91558079867.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7dd45eb82---4448923232.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/30702750911.pdfIn PDF document text
    • http://ndt-ultratech.com/files/22305751531.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/migesexuwidibe.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/19043032912.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146e606ef7ee---likezuruvijokapijono.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/11515042978.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/zodiweteposivusorizesenob.pdfIn PDF document text
    • https://armenia4d.com/contents/files/31785610944.pdfIn PDF document text
    • http://e-menu.hu/editor_up/xegukaridunumigejuruwege.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/tukadavuvijazunubeze.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/ritajudur.pdfIn PDF document text
    • https://paperland.bg/uploads/file/kixor.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/cafa880c870851a79d0d154a705cfd2d/59193817377.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0ae57bbac---newimigunuxegusotite.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/38724792431.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_off0000bb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB08 10440 bytes
SHA-256: 3cf6f6289bbdb37d6f75267661ac790f2bacf57350c68dba90f5a27640014f9a
font_01_sfnt_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 16004 bytes
SHA-256: fb87b5b5e3a831e498768b41c95c6b568921edc3f312263a1a52f3def56583fd
font_02_sfnt_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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