Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ee33084879b559…

MALICIOUS

PDF

91.7 KB Created: 2021-06-29 05:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2cf6619a2ea9043d51fc7a30491517e3 SHA-1: 65926f3590f11c1227189ebb2bedf2917e2c0b55 SHA-256: e5ee33084879b5594affd89924525acec74774a478cd16ced12d3eac9352de3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised WordPress upload directories and disposable hosting. The ML classifier and ClamAV also identified it as malicious, likely a phishing or trojan delivery mechanism. The embedded URLs are designed to redirect users to external sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7947e1ac0b---nozesike.pdf In PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/a0ba774da882f5d6b6b12d5c860267f9/bivozuzotefax.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/40821352764.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16087057d99a8f---40084610084.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/25236511926.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/jawatotedusanunokiga.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ff751e5f6b25f088b0e69a53657b3467/roliwivupuxivulasojub.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/supapemaberubudomeka.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/088fcb08ea9ce07029fb6b4849a5d060/retozurixikubenobosa.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/56a009a29ac564e80d884737baac3f85/rasabekunapevatixif.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/33690190234.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210526105624.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/4181356974.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/69685331926.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/17219256929.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608925631143b---36509495523.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/19611055790.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/94548719984.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0bd0a7482---20033018823.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/p29as8dhotrjm9jnp3b2s4ej24/29276095387.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/ohjkv6d1t875obthrj8ap9tq6o/podegazapuziwelurusan.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/96425574819.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/afb2aut367q6k3ctvum8m0kqr0/40360228906.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/24e673ed837453d887ae719e9a70fc9b/30818910863.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e5q3nlv146c1ubb3mqnub3r0cg/40517667996.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7a0d385d60f37daf271584605e534f52/48205447371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=body+pain+after+romancePDF 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_off0001056c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 17128 bytes
SHA-256: e33751c5e90a0dccf44922d4a3d8e306daba848b139cbce6c6a0dc23bfde8398
font_01_sfnt_off000131bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000149d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D3 10736 bytes
SHA-256: 881903308e9ad57152bd400c7769b4c99ada00dd6a0e0f0bf99f399b9f242ede