Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0b18794a7bd1ed…

MALICIOUS

PDF

283.2 KB Created: 2021-06-24 20:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 49ae933cdf46b15edd42d04acae516e1 SHA-1: 79b005c869f5b3d68e61738b29b8fc1c99d1d931 SHA-256: 0f0b18794a7bd1ed255d622a74bd938557b69371c95be648f256acd29955c22c
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 5

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=golden+sun+walkthrough PDF link annotation
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/4875605c8bd8933b7372865594e3c401/xedigut.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/7leg306mncekohad4j0668k0oa/kakiximuva.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/vuxuvinarosopiwogak.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/k0n91o9mmk984i648flmk0mcr0/87018731376.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/tosolegezeb.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609bac3d178cc---dimubarutilizuvuwipo.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/xejajevosozo.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607312fd99521---86859679103.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/7bbba003d5fc80e99a69df658c3391af/96016107424.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab644c4e6---62891873243.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0dc69b27---suxewoz.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8330d6e4a---19461357656.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160814da11749a---duxegegomoludil.pdfIn PDF document text
    • https://activepymes.com/pub/file/folelulemilenopet.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210623_11A859FECCA8ECEA.pdfIn PDF document text
    • http://altinay-law.com/images/file/wutuvoxovibukinikutekiwa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00042747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42747 5272 bytes
SHA-256: 6ff0ea13d49921f83bac3e630e9b19da20adba1c49206c342503690ee32d2c81
font_01_sfnt_off00043948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43948 10944 bytes
SHA-256: af3ecdb161e8edfe2719e2d7ea43ccfae3c1d1694b34a9561faeaf40c218a1a8

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