Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bb29f267ecc29c…

MALICIOUS

PDF

80.5 KB Created: 2021-09-01 20:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f9aca4f1c76eb8ecac90577116509b1 SHA-1: 5185f44e4419d6660937896123455e0cffea723a SHA-256: b2bb29f267ecc29c3efe7384fc6fdd4b4cff170e6815e3ec75541a196055b499
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/o2g0n3h5j0o7n7taiscc16tjp3/46282339387.pdf In PDF document text
    • http://cgl.lu/userfiles/files/94187113349.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/37337162924.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/12370986186.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/98593399605.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/j51om3qmc5ms36l093be906dc0/vuzapipaxuzolij.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/547d16561d938a14ae2d8871feefc642/87856036677.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/vosowonatazotetug.pdfIn PDF document text
    • http://rideco.hu/upload/file/92600820294.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/97990092017.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebd245bb6---kadekotuwezizogaxuvijawux.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/76611585719.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e3dd72fc8---29862320277.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609473c760165---98920152258.pdfIn PDF document text
    • http://honda-vo.com/upload/file/67852054781.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070f83cb6b4b---56399801047.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/51785201673.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/97355201928.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/xiwarezosalijidode.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/futokumabokubope.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a251ebf12197d4c38b760c3910a38a53/96552563182.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/8bc3ebfa59e8157630a907d13b589d7a/wobipifumabuwideve.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/936ddc6b509412dc676b2e69ad5ac9ce/35847981489.pdfIn PDF document text
    • http://wawa757.com/uploads/files/79986454838.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/wedekoben.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=action+replay+ds+romPDF 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_off0000d3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FC 10768 bytes
SHA-256: c55b0a009a5e8e41d01bf67f185b00593242bf3d5275082551b85a2a96bba6c0
font_01_sfnt_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 17652 bytes
SHA-256: 773729c77bba7a3fadc6f13006061bc16cdb8fc27d4d45cfacfdfe25bd037a53

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