Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf3039f3aab4f32…

MALICIOUS

PDF

135.3 KB Created: 2021-06-11 04:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 06589ceaf34a2ca2a46bd4e9764bedb7 SHA-1: 3b7302cdebd9e1b562b6a06c054ab68c4e5d5ad9 SHA-256: 6bf3039f3aab4f32edbff94fa476bdcaabac304c1f1ca4397b62b9b9509fbeb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple links to compromised websites, disguised with search engine optimization terms like 'lady gaga shallow download lyrics'. These links likely lead to the download of malicious payloads, as indicated by ClamAV detection and ML classification. The presence of numerous distinct hosts and the use of compromised CMS upload storage suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nomylo.ru/uplcv?utm_term=lady+gaga+shallow+download+lyrics PDF link annotation
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074d898b03b2---88865671332.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ad259d894---41170633593.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/9p3cpc2981mdvavfje18chq83i/21112059250.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/p2mmgmrkd7gisama67bso1dtg1/65951869817.pdfIn PDF document text
    • http://cl-pub.com/files/files/7506137171.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/fexas.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76f237a3812b15c2babea6ee09fdbb71/nofiwal.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e9837a63f---fijamivij.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84b11b5497.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/da4ffd3f5f7a42a65db2247bd39a00db/86030410971.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/d19399559f66b33f4d4d2bc221fbfd06/bukozu.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/jejemawotega.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943fe2e2f5a---nutedozadikonoweperusina.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/zimif.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa3911f0d---30645213853.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a51d1f82cbede9247d9cf691cb998eff/zapokogizuvefurinuzew.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f06645811d---66323468482.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0001accd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACCD 5336 bytes
SHA-256: 8b9104be6dd06bd6103554318d6bf15c9f846c6dc48a69cce0f99becdc12bc08
font_01_sfnt_off0001bf0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF0A 16476 bytes
SHA-256: 2f6efae9fe315f2f52500ec3286d0da460db3673101f3949d197a617e95f47fa
font_02_sfnt_off0001f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F031 18776 bytes
SHA-256: e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed

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