Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e14dce1ae5aee25…

MALICIOUS

PDF

86.7 KB Created: 2021-07-03 18:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4d743479cda494033070ee5752c221a8 SHA-1: 168593ab93139d5bd30e55e293766f97fd0078fc SHA-256: 6e14dce1ae5aee25c8c5f222cafd75f0a15f1bfcd079bc5a926eb16f8681fbb0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The PDF contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://wooshin.kr/uploaded/file/209100615460c9cc62204a6.pdf In PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f786d95b19---90083627233.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/15ff68efa3847e56d114380a82395291/jezegiwasuzujimarobiv.pdfIn PDF document text
    • http://arablift.net/userfiles/file/9681212144.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c9cc2a52a---48099890329.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607417ab5c04a---86452863652.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b75126c63cb---22689175103.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/subagimutizo.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/sijowolixujixogowo.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/16073207901.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c47ac4e92---vesajutemofuzaxo.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/52333034196.pdfIn PDF document text
    • https://ekransamara.ru/files/majofofedivisejoresekupaw.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3o8l39uds09p4knqq408u0sss4/72820114682.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/dorekijonatabe.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4964f4d89a---95976063814.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/savokexixap.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/nuxiwetemovez.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/jeruzimirujuxawuvezoguw.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/relojisokelixaxivopivupum.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00a9b5a10b---40678966675.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/lozizix.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/ce76681342ad19aaf2005553ba8f787a/825648532.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/10cdcb403314d0b44eb7d8c96f84b657/72429206665.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/u1nu9u5a8gpul1o9poh5fld14a/43318361976.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sending+an+invoice+email+templatePDF 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_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 17120 bytes
SHA-256: 2bf09efd0e9786cccc6ace2fb4366a47cec08daf0d37ef0598f7da7590a7e89b
font_01_sfnt_off00011cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC0 10732 bytes
SHA-256: d05a218236f4ff66db57688f1fcc2e700ad17d0e4471324211cf11236664b653
font_02_sfnt_off00013541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13541 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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