Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a9916d09b332bb…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 05:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 79f721b9648ed04843e063a592354656 SHA-1: 7ec3402d14ef31a5d04a1b1a3f7f06ea7003325d SHA-256: 56a9916d09b332bb01e8317ad79e3118b4ffafbd50ff1e98bcc21c163b67e0e0
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to lure users to malicious content. The heuristic 'SE_URGENCY_LURE' indicates the document may contain language designed to create a false sense of urgency, further supporting a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://limobebe.com/userfiles/files/mefezazalaxupemokudinose.pdf In PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202166232709223.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/7956487137.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/71401059163.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/feralipewevalo.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/fuguwumaki.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/kejapofidoxowidejoxid.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/e4uh7dv6ip2jd0c6lmm1si9efg/vamoroxosalotaditaroma.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/pumitononanubabizolekopuk.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/9dtom1vb0kuf5ren88bhiteda3/80477784124.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/79908722743.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/10261990325.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/guzudux.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/68767288942.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/76614995457.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/35072614289.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/bivitawosus.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/sowafofevewanolenez.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jiliw.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202108251628193943.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e523fc6de2---57290306002.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/80961075003.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/676f33639a6cc1820bf58198a5deb5fa/tutasa.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16121cfa2e3b9d---96769010750.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c41f92d8b40---8038247946.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/29042951993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=honeywell+programmable+timer+switch+manualPDF 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_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 11252 bytes
SHA-256: 205dbf7e325c19b79f3ae05d69d3f44c18c806fe2a4f59cee46feec2c361b571
font_02_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 17464 bytes
SHA-256: cfaea217e402729c85d6a98f248a3eb2f2f1187148a85bb929e12fa79fa23eaf

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