Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6554137afde4f3…

MALICIOUS

PDF

87.7 KB Created: 2021-09-16 10:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3065c099a8abff93109ad7c0fdfb0532 SHA-1: 34d8b5b56ab60ead0a136d1881d59e219e048087 SHA-256: 0d6554137afde4f3140ecdbd70bffc2f105c6f15f19d0c2bcf859b98119281fa
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress uploads and other disposable hosting, indicative of a phishing lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's purpose is to trick users into believing there are new or changed bank instructions. No scripts were extracted, but the PDF structure and link farm indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://sukhayurveda.in/userfiles/file/jawadalopufadapu.pdf In PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/kakuvanoj.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/65735098801.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/jivipipuwemaximulepizevo.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/bikikakilegamedugebiti.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/2815465523.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/92151357924.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bec1c19230---81973794470.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613171b73cdc0---tonomiga.pdfIn PDF document text
    • https://stotex.rs/files/muribabimarizo.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/40673449660.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/ninotaviles.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/25c9729e1aeba573b2d6abcc5379dc7b/7017687366.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/36545501796.pdfIn PDF document text
    • http://kes.org/upload/editor/files/14201860102.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/6674355152.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/3693240207.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/xisadolefunekexaberepokon.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/durizizejulom.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109031351147545.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/30484363531.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/wosimiwowova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=outlook+not+syncing+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 10744 bytes
SHA-256: 39fef96d9edb1d3827e6c0475a0d90de99f06ce0688d35383ebf4935993b36dd
font_02_sfnt_off00010997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10997 18508 bytes
SHA-256: 187fa70ab2a056df1dc879bf23d2dd9259ac139f3b06605b8472330c5e9b8ceb
font_03_sfnt_off0001392e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392E 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0

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