Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2a2858c972f42f…

MALICIOUS

PDF

83.1 KB Created: 2021-09-14 02:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3536bacae17ce25eb0349c53612ca2f2 SHA-1: 7ee12abea4e9a5f7c4a5618d31b4ebcff8022299 SHA-256: 2e2a2858c972f42f03f7a5c970838b2c635d1e4d5e1c6a5f3ac8a18b67d94a8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://leeharringtonhomes.com/userfiles/file/80764131468.pdf In PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613897ec270cb---fomapijolexopavetixenon.pdfIn PDF document text
    • https://datenglagi.com/contents/files/fifosujawenojalolojo.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/nakagawomev.pdfIn PDF document text
    • http://air-ned.com/uploads/files/safezekotutozumapos.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/49355020152.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/zebunof.pdfIn PDF document text
    • https://tsolisp.com/files/file/47734682781.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/29832196038.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/pexijakazeduzolobaledizax.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b0f3465a4047f16d4c97d9f35a3c0a4a/wojixatunom.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/83012993423.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/gasabajepologiruki.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/togeterodijiguvutefadag.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a1c85e10028162c6a7ccb78046253e4c/53777833397.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/jumorugisapus.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109080516274902.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/13484190580.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613753f60a11f---49666992430.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/taxisaxu.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/xiligojoduvij.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210909113741.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161380be599583---mobegikelakiwijavisiza.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139484f8564f---52389048045.pdfIn PDF document text
    • https://oasis-travel.ro/files/97619020259.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/todokavegutumaxudibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=amnesia+memories+premium+apkPDF 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_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 10444 bytes
SHA-256: 51a01aa10f83a5da34ac961248f560d06440611f76b210881dd0b2920b99eee9
font_01_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 19404 bytes
SHA-256: dcff465504692df8982c40484a2a65920723bf1fe4d67fd319d8438df038f941
font_02_sfnt_off00012504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12504 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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