Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc34482c892817e4…

MALICIOUS

PDF

171.1 KB Created: 2021-06-27 22:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b759021a5eb2a61fc356149eee6ac4ac SHA-1: eebedbadc065825a4f04c8e2c940152beb7cfdf8 SHA-256: fc34482c892817e4c3f9ca25c0899fc31b55a2017db734996bcdd781ced907f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of external URIs and link farm characteristics points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8964

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://chcial.ru/uplcv?utm_term=the+devil+is+a+part+timer+english PDF link annotation
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081c74984b49---88485020978.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/98216666219.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/jj0d6a42q0m67q7547laie98v3/totidupozidafebatiza.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35e0c5e3f9---64203107969.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/62e451d846db1c7ce919e323d99b7cee/lelibagavisuligapig.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091146b45818---62189443182.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/lopefejokuzolu.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609177e23d0c7---41002660261.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/602f8f7fe6960bd702e096d17a645897/vixafigozavatuf.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/fa4j72ea195n4teoqljnoodmh7/74088106424.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9f4b122f---zubugetidat.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/d00fc2839b94298795d2d47d1ebb472b/27108640325.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/8281bcff57ef72fd66feac7e7c6ca91f/nokuvedalaledelojubu.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/3847687538.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2df3561bd---8263710612.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/smf5q7e737qkctoseip8vfjm4t/kugawo.pdfIn PDF document text
    • https://avvocatoboretti.it/file/12311859626.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/zobikupujiredede.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2be8128b284df6394f806461d3dc0d53/88718820124.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a41fb0de0---94126420466.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/24936982387.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/13980d41a1c4b6fdba7dd203dc34a7e5/43781308617.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/ac5c5651e5c6393423ab71404b9b2de0/38944144033.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6c5515eba---torakubefodononew.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16355 16748 bytes
SHA-256: 3689bdb0943a7a37c63cad6618cdd46166ba9e3a1b02699e017d43f76fd6fc4d
font_01_sfnt_off00017a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A44 17404 bytes
SHA-256: 294867069e9bc3ccf78ab826bf3ad3c255ef3117674e03598339f2e36b963122
font_02_sfnt_off0001a6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6E6 10748 bytes
SHA-256: 45c8affe45dc85abbf9fb74180169f902942de819d5d2fab1caa7bcfd1a0df14
font_03_sfnt_off0001bf34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF34 76436 bytes
SHA-256: 52598b5ddcaa5a8be6fa83ff4e2eda9890a49553ab1075a596473cbc1d6ab353
font_04_sfnt_off00028586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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