Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02c8aa3d3d50476…

MALICIOUS

PDF

74.9 KB Created: 2021-09-01 00:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 928a0a15ef4d0307d5ff69063b6901eb SHA-1: f5d9e854ee9f7b11174d1eadc9708a37c46dd4f3 SHA-256: d02c8aa3d3d5047646d31a8f31034bb3f1d74fc88188f79b3ac453dda701626f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are characteristic of phishing campaigns aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=meaning+of+wold PDF link annotation
    • https://mlmrockstars.com/ckfinder/userfiles/files/pazuzoposovedate.pdfIn PDF document text
    • http://saptpadi.com/files/file/majavok.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/17669359871.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/romov.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607480b29f426---tipejerapi.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/39153584236.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/19488355969.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/923e153b2940cabf44925b1a8e743b8c/zosokikopun.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e9fb25c12---74517279615.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f95f732aec---24257056906.pdfIn PDF document text
    • https://breedlife.com/upload/files/zunax.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/37335384302.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/pipatoxiburidebavusuw.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dec16ba0ff6---41949774691.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/23ce2af3e5c180b30e1525c34a1ff603/dikitetupaxisujozajutet.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/finodajataguruxarexesejik.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097dad490902---tasutapekogaxuwodomasu.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/39314456374.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/89773845910.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/71681361600.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160942dcd93102---35720730626.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5beb684529---govemirupapuvo.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/377055842.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a270439e865387769162326fe57a29c7/90692943865.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EE 10240 bytes
SHA-256: 39760cd97ce6041c98eafbc8adcdd90db48ec1aed2cd5b65a2751464d9dac2d7
font_02_sfnt_off0000edd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD3 18704 bytes
SHA-256: 8f1715b9822c0f8804cf851d758eecf3692fb74af6dc2da7a6211f9089eaafb5

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