Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea0a678fa461be3…

MALICIOUS

PDF

85.4 KB Created: 2021-07-23 00:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 42fe34ae59d22316e074c941bf2178af SHA-1: e49d6db2765ec42742dc060b60dc13012073c6d5 SHA-256: 4ea0a678fa461be35fa3f920aa362874adfcf89ec98bb40ca66060fe96db7674
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to obscure the final destination and potentially engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ljq2jsmc9hqeg5lousihd18250/19536134193.pdf In PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b70072eb64b---54851270668.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/48825512335.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc58a5244b---56346300099.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/38591240844.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/lilerezo.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b7ecbd3a2---sisajalezeronatawex.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nmq9kclb5q53o6cccqtdol25n7/ragokuzepakegudup.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d42142133b5---razukizun.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160828b7586268---retigofemo.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/39499347875.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52701dd7e3---91664992855.pdfIn PDF document text
    • https://raljob.com/userfiles/file/gikowu.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/57417362976.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0edb76f9f9---55343056788.pdfIn PDF document text
    • https://bbmint.com/userfiles/file/8770959689.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/dowubebadisozudakelejug.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/kujom.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/zulutejiduzela.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/8283063749.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e336e4546c---xusuvikevironexikexozifa.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1fe4b8cdf02c20c1219080cca9183b8c/66219638082.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f76d6d1020d42402a55210f6c6c37134/70384117990.pdfIn PDF document text
    • http://dakmet.pl/upload/50772730534.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/sisorobebimibowanade.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/bifesomubipabikemosolegas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=which+roza+todayPDF 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_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 17832 bytes
SHA-256: 5ce36dc22889f72cb3548b3aa0e5e8155e432e49ddf107700154215e0776b06d
font_01_sfnt_off000117d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D2 10184 bytes
SHA-256: 4c425c43db3f30a22d3f4d83d9666e2bae241da98f0133704ca1acc27ff4f78e
font_02_sfnt_off00012edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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