Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fd4ea292aa51b8…

MALICIOUS

PDF

112.2 KB Created: 2021-09-03 18:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 03e0a805679499a78f0b58ced419a47c SHA-1: 8a766c8d0430899a971e247c212045f889f3d329 SHA-256: d1fd4ea292aa51b87a138d6ce6dd5ed46d6cdd2e7eab848f2f884a9e90661426
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of embedded JavaScript and a link farm pointing to compromised WordPress upload storage suggests an attempt to trick users into downloading further malicious content. The URLs extracted are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://goddesshair.net/upload/users/files/88539547302.pdf In PDF document text
    • https://afmiletisim.com/resimler/files/lavosirategiwamalo.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a577eeebc3f---wojotupa.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b13eaca00d8---3764237980.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/992da1fff7a319afd5140bcb7c1258af/tulevezi.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f0fdbcab5ac---gegasizopemiva.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/21351833342.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825c63e0650---78373238091.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/jobofalonaxuzepa.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/278b78ea5dc967fdc25214a5dd6daa4d/jexivizidegugirowex.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/zasojuxazuleboneres.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/jonuwikut.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/65259939238.pdfIn PDF document text
    • https://menu2uplus.com/images/file/kexusaligonareta.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/16967256957.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad82a60a424---81511984588.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/xoxopibumadexamimuniresi.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f26b979a---68968142834.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b29116455f---gasazav.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/bujikalimetika.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/jerewe.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/jgl1a8o080b23q3s394339algm/52254532324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=world+times+magazine+pdf+october+2018PDF 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_off00014dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCC 19272 bytes
SHA-256: b7c7d1e099978edd1dca644b4b86825e80a74be9a123fc45dc12344578e6d9a7
font_01_sfnt_off00017fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000197cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197CD 11660 bytes
SHA-256: aeff420132d7ef7babc5b68bd52db008b55af842e0bbfdc004a48d22337f7660