Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34afad28c005a6b…

MALICIOUS

PDF

89.8 KB Created: 2021-06-30 07:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 092c556763bba4566117d3e154787b78 SHA-1: 8a65fa2d90bf705c6e933d435dd4bc4d8afd3fa9 SHA-256: f34afad28c005a6bbb69bacf27ade5594903716ee7cd77df443c75a5743076f2
176 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 functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious domains, such as http://79.170.40.182/boothtastic.com/. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://coretry.ru/uplcv?utm_term=the+sanitise+shop PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eb8b11b76---jitibipasi.pdfPDF link annotation
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/009b71692d52c4609ea784b88f9064d1/xaxitituk.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e4970c9ad---kixebumobotunil.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/21980498622.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/27669983090.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a7e98dfe8---vegupugenavezu.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/puposewuxifekigukejex.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/5b5babf11595c38fa5bd12191f47e50f/xamuselo.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/25374132383.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/53105167524.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0de35d3e5---7012815938.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/momituvivumeko.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/59766784671.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/906370c3e0f5a1a6f34938a58f3435f1/litufisajulozasojofater.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/sasigise.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/6416f6dadd15dfd8f26fe4db9d9d61f1/71940898115.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/81661259537.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/rerebegelomag.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off0000f929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 19136 bytes
SHA-256: 7fb2af6f0be66d9de11b918f3463d0ade92009cef5ef7a9b5436aff3a57eb6e2
font_02_sfnt_off00012b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B61 10168 bytes
SHA-256: c16031afeac5cde81bb762a5e06fd8d298fffc14fce2087975448d9ac70e7b7e
font_03_sfnt_off0001421b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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