Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d86372aa346c460…

MALICIOUS

PDF

79.6 KB Created: 2021-07-03 00:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fcb0961e3fdecc3995a4eef3c4ab5eba SHA-1: dde6de0b25588a3884a57d8b345f84fe43650878 SHA-256: 6d86372aa346c4600a4ee7da6e71964e34cd323f79c4153604a20894fd155cb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. Heuristic analysis indicates the document functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160da35cf8be11---pajonudaxopowerogadab.pdf In PDF document text
    • http://giacongcomposite.com/upload/ck/files/kifodiweni.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bea56135d73---ketapikowujisapel.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/pipozutulugivu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608774b8c3caa---tonetofima.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/861qr21a080ere9qa7se297lr0/vodawodowelujifok.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/88149571624.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/58021796237.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/53334788709.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/21186981134.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/vilunemosefafejuxemawe.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/zedatosib.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a240ba8d18e---dipomuvuwawu.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/2ef65ccec5cebac444415f05f19379d3/93141551401.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160dc2f45e0e04---57496096808.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/20165853415.pdfIn PDF document text
    • https://angkalaris.com/contents//files/20982515535.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/86326792517.pdfIn PDF document text
    • https://tantecoccole016.it/file/79427281121.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/lonobawaxigitunu.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-04/images/files/metazewemoji.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a50604083a0---mijukoxoremukiko.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/hnmu61grh6014fba4t9h70e36s/dewiredo.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160959ce780656---sodasarumojodolixupunevu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+haves+and+the+have+nots+season+8+episode+3PDF 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_off0000d087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 10752 bytes
SHA-256: 50d42069aad319dde6c432e4b23519e1e309461aa9688e8a7d3d4e30ac3eba58
font_02_sfnt_off00010155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10155 17448 bytes
SHA-256: 549e04b42d27e9e88de7cfc9356d7c92fa45b6649814a948117ea9ea6d91d28d