Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45919acf81fc048…

MALICIOUS

PDF

84.1 KB Created: 2021-07-08 04:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 712d520af0148b806fa7f5853663ddec SHA-1: 137cd35d52968884c3e2a0aaa3faf075de72111f SHA-256: c45919acf81fc048704e299e83d14fb3c812dbcebda6034b3ccc6f9f87f570f4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a phishing lure, specifically a payment redirection scam. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/1618c4c884b5ef17a96a817b0e6b7612/30547999038.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160caf0f369904---42309974067.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/44376683096.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/cadac32a7896d7215692d9d1fac9b5a6/12638007475.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/32442446179.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/41c0d6cf0830fc80364098fe99acc9df/34324189485.pdfIn PDF document text
    • http://altinay-law.com/images/file/11289226483.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/laluxugumepu.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/f81503a55014525c5503e06e8dba417c/jewexukunomuj.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e7fb5089b---76431765954.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/05248d9e879395a0168d73f5332e623d/71358304079.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/691d26813c59cfff2ee41da80dd7c291/98089390521.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887488ba19e---44243577039.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/419b771fc1acb18a906f1d9b9962155f/mogekekaretenup.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-12/20210512223104777064.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/63181b48c5608a9bbd6d6ff25804d1ef/73620335419.pdfIn PDF document text
    • http://veribase.com/E/file/11407419368.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///kenolibetanixapapadiramud.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/gulajit.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742d3b5bf19---nuzabadewinifetiziwer.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c2a408f71541a89f2a65c5039a40b7da/13736841550.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/rekesemademo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=science+reporter+magazine+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 1848 bytes
SHA-256: b50ef5d88f9bb9803ea00c79bae77c03e79e923ce50d4d42f33b52659606f8ec
font_02_sfnt_off0000f805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 18560 bytes
SHA-256: 873b163a4b90251069a4aca6ac4d43cbf0966eace3e34a9d2c5893b0d2b18086
font_03_sfnt_off0001270c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270C 11016 bytes
SHA-256: 4bfca91671b5d36a0ef1e46ad1f5fd3fa01e0c081642d460e8e3d71ffccf1e63

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