Malicious PDF — malware analysis report

Static analysis result for SHA-256 150e150ff7b3409b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-19 23:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1425750728cd8746d8dd21b7255c6d4f SHA-1: 16a66a5b43737be411b42c86835a8b4f9b494d27 SHA-256: 150e150ff7b3409be81df2cc0499e2a2e53f4939563fc6273e74ff6667603ba2
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://jaurrieta.net/USERFILES_JAURRIETA/files/mabejetopekoremetu.pdf In PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/pisogunanovemelaw.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/kurolazuzabim.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/61484807592.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/negipidemebemizatesi.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132ab3480045---dazip.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/1f5773151cd05aec8d37c7addf5f208c/rogosojulotakix.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/wetigorozedikenexonotid.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/91093914850.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/c28eqe1etj99jotuqi2ruuc5g2/42941407576.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16ec6e12adc5122312f54453c8fc6ab8/jijepokaxopiku.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/3495641476.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/28186604148.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/45593391367.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/bijikegijakikoxixovo.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/gogopupijav.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mowilowizezivedinu.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/41744056397.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/tudixokejovawakev.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/vibikofipisofu.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/35533303668.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/dumizegijusa.pdfIn PDF document text
    • http://cwesp.biz/upload/file/mitetomiputazela.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efdd74c2b5---tujitawafixob.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/50839129270.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+update+operating+system+on+androidPDF 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_off0000dbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 18980 bytes
SHA-256: 67fb6b000ec2d66aefb63c0d15b9a13055b9b0f330b42e66283d0460d7239756
font_01_sfnt_off00010d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12535 10980 bytes
SHA-256: fe8815b9bd8090bcfe2777041965786e2da150f736dfe68eac3b105b6663f990

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