Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7a593879a94a6d…

MALICIOUS

PDF

81.6 KB Created: 2021-09-13 19:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2490b51c1b64fcc511da37c2bfb1f028 SHA-1: d1b6edff9d8264bf99c71efd3a0e3466f40c819e SHA-256: 1d7a593879a94a6d32bf6818578cfc25c96e2617726c3e9e8fb074bca9d3306f
166 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of a payment redirection lure. The PDF contains numerous embedded URLs pointing to potentially malicious PDF files, suggesting it is part of a phishing campaign designed to trick users into revealing financial information. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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
  • 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://boekenwinkelindex.nl/images/uploads/28050489829.pdf In PDF document text
    • http://kokocurry.gm/userfiles/file/62982072438.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/esrlkrbbd4jr9oqu99cdj0277f/99821383446.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/xatiridefizawe.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/dibofetazedevigerizeja.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/bomonewivedon.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/83224721898.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/41964832653.pdfIn PDF document text
    • https://vzglavniki.net/data/file/41368415393.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/xonilezedofamemepo.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/47370540572.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/fukomirulagavazusa.pdfIn PDF document text
    • https://schmitz.cz/res/file/83154140677.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/gorebukaxogogizulologo.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/dobitopuzod.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/72419679447.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/98001723701.pdfIn PDF document text
    • https://panelshock.com/userfiles/file/foduvevajaf.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/jeritadizawowavagibapap.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/93575217335.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/borufesigukusorojaluw.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/begega.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/4c60722a8e509d5a0052a755c67bc836/nasotubuk.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/1848028503.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pazere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+set+random+wallpaper+in+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D2 10632 bytes
SHA-256: 860c216ae32429a207d220ee66054bec6ca8a750bbdcfec3e58fa41f538ee9fd
font_01_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 17880 bytes
SHA-256: 65e27ab081166e3af1aae2bbc321c969fd762899863e171dcbefbfb143e9cb0f
font_02_sfnt_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1