Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1982da35ccaa8bd…

MALICIOUS

PDF

95.2 KB Created: 2021-07-23 13:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0efe158304cba06d5196cd7f25c92d3e SHA-1: 25d04edd8bf73524da5546e85a6bc95bae110380 SHA-256: e1982da35ccaa8bdbfa5e6c1fbeee9b61dc8fdca81d11bee817bcd67af05c290
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/cfeb6013fa8f0b36bf1d469c237d119f/98374760070.pdf In PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/xukazitepofujozem.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/xumawufepoxagefevo.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/kowaw.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083f9196c2c5---barubefis.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210625/file/16246035048930.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/tetufol.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9917bdbcd1---basesoliwototida.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/mesujuwevabomuma.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/40e96710890caad956b4c181755ce5f2/7331307649.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c455373071---wuniraxelinex.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/0dd20fc7029772c67b9530e4237ccdeb/68024958123.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/5jfibdf44b38hb079f8j1o13m5/kawavinom.pdfIn PDF document text
    • http://sivam.pl/files/file/81582855847.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/lpcf762pfoia6a68ca0i9jl5k6/wopibaxugenir.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/c8d1e5ecbd41d37c05f4fc26bbdb7917/jijiwene.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb88c0c14a---bumiwalobofederegagare.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3518d27626---95068153358.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ba9d417c4add335d8bb5accf870def30/kuxulopufurus.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/92277627909.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/megakavemuzisem.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38b9bb3ce---5838550535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=femoral+derotation+osteotomy+physical+therapyPDF 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_off00010b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B69 19216 bytes
SHA-256: 1af3513d76e29b7f7d7beb0867ad89e6ea9d23be124fc91d1c6f9fc488af0089
font_01_sfnt_off00013c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15498 10872 bytes
SHA-256: a07c6e21a0e3bb3dac6c7ab3b0fff559bc4a6618cc7746a9816b12153e6addf1