Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27206d701d1c5cd…

MALICIOUS

PDF

81.6 KB Created: 2021-09-02 01:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bbe75ed96724658f412963a2dd85d0fb SHA-1: 62b121260a5cf509c87efe1e89b6a24e5f6dc054 SHA-256: b27206d701d1c5cd6614ba87946238058463ef3efd71c879eec0dae0513592d3
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, directing users to multiple compromised WordPress upload directories. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d3c9cdd0f---1738586544.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2979333922---78702687256.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adbdd8572c---wekikaw.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/64268238342.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/22351777222.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/kekikonow.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/dbecd39c67e50ccf300712a262df65a1/putenoruverixuxopaguxo.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/79239023926.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/413d7cf9b9304af5ab737d340344e6cc/72024438031.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/74802822936.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d982da3ea5c---50176666371.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612142efe0b5c---dixemukowamo.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7219b2699---57449928370.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/ratulakinabeweros.pdfIn PDF document text
    • http://xycrusher.com/d/files/60492142652.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ca6e6f2a5---bavotijogefulenev.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/7019873198.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976db49f19c---gavoleza.pdfIn PDF document text
    • http://clipsttm.com/userfiles/file///39763239963.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612465d8ab236---21024672804.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///bazafigosuvil.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/24969269825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=young+naturopathic+center+for+wellnessPDF 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_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 17980 bytes
SHA-256: f8431278d64499bea8411a71861e1330088da790b8bff88484524d38eca3b332
font_01_sfnt_off00010770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 10928 bytes
SHA-256: 016890193826769c9f9a63c599f1ec39ded0aa9666ca1eb3b1cd0e8d8c9695ed
font_02_sfnt_off000120ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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