Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd4044eed5606b0…

MALICIOUS

PDF

109.9 KB Created: 2021-07-01 00:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c247db16a887efb2d1430e4cd62e32ac SHA-1: c4c43dabe960c50c8fbe2a16a80abe3132acb99a SHA-256: 1bd4044eed5606b0b7a18ef6c8eda6d342798b5ba4b6cb10739dc2b878b0c8cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a4aa3c0cfe0b6f66d7bea1372dd226ea/lilizaligozojekogotade.pdf In PDF document text
    • https://eviinstall.com/userfiles/files/70532763089.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/5360e27b1ecf361bd9c1be7a43b9512b/46024150005.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210701_CA75648936D3BEF8.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/777fbc35f0f34a95ec2b19d123fcf452/kuxemizotoruro.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/94766891066.pdfIn PDF document text
    • http://arablift.net/userfiles/file/belexoxiwigola.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/96000533467.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/bukoluneweziruraleb.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9f4b1d6e2f2ca760b4a9df8528645f91/2951486316.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/62342497111.pdfIn PDF document text
    • https://estoniapools.com/contents//files/jufurisi.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16096668a10e0e---rigoxefiperinolax.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/moin4iuvqtcll6di7gdd7jh41j/zodifosedabititudepoxuv.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/aa9eafdf48ca92fe5a22f5004255d132/refamujuji.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/tifujopisusoxamudoliw.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/87844050067.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/289c18793c2474a2e964778c53cd51e8/bizedariparivezofatame.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/2301f01b1d1410b84346ed84bc2ecae6/42142104588.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/paxasobubug.pdfIn PDF document text
    • http://midel.me/userfiles/file/6767638874.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/oq9ath8i2anjcsgrfnmkq5n8d8/35087194822.pdfIn PDF document text
    • http://tfwdynasty.com/clients/f/fc/fc55782506b94f933057639757072b2a/File/3726085010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+i+add+cells+in+excelPDF 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_off00014b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6C 17884 bytes
SHA-256: 424cd28c55c356f0762d1af36801fa327d4ca7ce17cb4500c717d3d2749d0d17
font_01_sfnt_off00017ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB8 10344 bytes
SHA-256: 80fef104b9bd5e8d6adac1c57afa3b778bc8b3b440476427f80b7a01f5c5ff64
font_02_sfnt_off00019229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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