Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7ef3f8b3907409…

MALICIOUS

PDF

88.2 KB Created: 2021-06-27 01:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f9b26ecc23b235964af8469bc4865542 SHA-1: ec670eee9944e8ce5afc85bd774ace51604c7272 SHA-256: ed7ef3f8b3907409f93f4171c6e6c2b32af0e42cd6aab6b11ca48c8c50358ef5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress upload storage or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://myxroad.com/upload/userfiles/file///32752909381.pdf In PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608630bf2b336---18364801815.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/72483085418.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0b22b9de8c7c576b7fb204cd26372fd6/92986984370.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/fupofosajulezezalegafigi.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/guzafebaba.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094399176300---82242062010.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/743ea092c0bc7d5fc11a667c4a362ab3/majur.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/80589557733.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/23368528806.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2eaa16b7e55127def82b40da98f32635/63714993287.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/294d942198d5486d054f83df5ef21312/82428410495.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/25a6f696a6f7e808ac371a3da56dd40b/46625963332.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6214ced2c9205cefa5e0b9f7b49ba6ee/52440075058.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d1114fd8e---raxirikawiradibirapik.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/4gb3dkjdg22t4j5rev1t1uq7eg/75954228373.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/32932312853.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/bomezige.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/gioncaica5f6lm7m74d23k760l/rebufejodobevuzip.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/80673670129.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/84a9d481e31f0c8d957949d332395e42/29249538673.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/csp5v9c3tsjkpfsm0u37tfrs93/fomisilanevofufixotozo.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/lfm85g3fhfsbu4ks9d7creoptf/dapokex.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607494975893e---92776430524.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=panic+attack+without+fearPDF 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_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 10500 bytes
SHA-256: c765e9bf2486e08365d80fd3052473a506c876d1eea4ab9917ee129febc6e47a
font_01_sfnt_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 16820 bytes
SHA-256: 5c0f4abdfb692b287ade460c9d855085059da1a7774ea7d6b8d416e0055bb846
font_02_sfnt_off00013a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1