Malicious PDF — malware analysis report

Static analysis result for SHA-256 2686c479a142ec9f…

MALICIOUS

PDF

187.6 KB Created: 2021-07-24 03:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 374e0ee5a95a8e74ee4b220f04b08f3e SHA-1: 2510b91fbf710a37575a705d887ae0bb22927787 SHA-256: 2686c479a142ec9f90cde6b31bc9f539031f7ca6d1c7a738e347479f5d408bbc
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1555 Credentials from Password Stores

The PDF contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites hosting similar PDF files. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or abuse multi-factor authentication. The embedded JavaScript likely facilitates the redirection to malicious landing pages or exploits, contributing to the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9730

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/b45e210d2acc4e947ffd223bff1cb11f/zidewakegewitami.pdf In PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/3l4t1fiucbkkl3g6o0ee7prd5p/70357629486.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/wavapikuwexa.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/9a526a058830ea03a76430ca9ee6123d/mekapomokikidoterur.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/6dbd309d5a9d2c4052cfc34999e5b306/60905170617.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ba61167cc---bimumufiduwivus.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6d799c7e6---17964615593.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/6af07bf275b995a3dddc4fe8a0c8dfec/wimusavizexapakegezew.pdfIn PDF document text
    • http://elyriacatholic1970.com/clients/7/79/79c6984f8945646ae1b55d50a6b4dbab/File/vonap.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/gupebafupevugezeluxen.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/38247395616.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/70728079868.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094600a233e2---boxufozuluwaxeja.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/tunawisedaki.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210618175434.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160729613e2ff8---30576739049.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/wazevizanibapesetujesif.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/6jh6u6q755sacl9hrqcbit4555/44190354606.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/buwosipufolunisedovetofod.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085328586254---63840461400.pdfIn PDF document text
    • http://prosquash.by/data/tolokirigagilelewatuj.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/37653166409.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/56879423293.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/44069462900.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/46720440534.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe2c81705e---23984001535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+get+free+gems+in+monster+legends+glitch+2020PDF 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_off00027ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27EA3 11080 bytes
SHA-256: df88ff095c8d8550f3bde382af34b4bb993ce64cbce2ba21598723af0f4041ac
font_01_sfnt_off0002981c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2981C 17968 bytes
SHA-256: 9e3a3aa47a3395c262bf4220a0ba16ecc2464874856dd12caae58070afa4451d
font_02_sfnt_off0002c6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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