Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff68d3a1dd687d6a…

MALICIOUS

PDF

92.2 KB Created: 2021-08-12 17:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8c45e3456e7687949aa74af50f8e52b7 SHA-1: b6b14b42bff888cd1d234f02394fec62c2d1bb7c SHA-256: ff68d3a1dd687d6afee3a697544668cce16ca2ab8cfe412ee0e70fb7cb04b4c1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites or disposable hosting. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's purpose is to trick users into believing there are new payment instructions, likely leading them to a phishing site or a download of further malware. The embedded JavaScript is likely used to facilitate this redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ayurvedaemart.com/uploads/file/buzusubobowonaso.pdf In PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/ebabd6ca55046e9ceae02b7ef017e7bd/xadedenepopek.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/31288292209.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/lixunusevemutuzadenevo.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160909413044c5---56013230254.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/96938946549.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/deginimof.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab76a38824d---nebajezi.pdfIn PDF document text
    • http://cosmoscm.com/contents//files/zejalasejusexobap.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081cda857e45---gaxefupuze.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f5790dc3b23---senasibenitinubefe.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f1e6fd1d---82253910578.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/8275e8079dfe00cdf63c63b5e437b616/nejojufewitelegafedubetew.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/0omukbhnjqearpj5p8asc3nq1a/49941194175.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/dosasu.pdfIn PDF document text
    • http://armanetti.com/images/paluwetafejopiguzutogoma.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16081c10145ef3---52431826905.pdfIn PDF document text
    • http://coinmarketsuite.com/ckfinder/userfiles/files/59991976442.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca303ae94a---buwotikukikulena.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/s4shoipd1g565delg1gk48c4gg/22884998213.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/puduxenusowokoloxemumutij.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/niwadotuzonitiwolojomu.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084414de8926---nabitodivazupowi.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af70c3e9569---luzenuwefebiza.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/luruzivipelumekurodi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+use+a+woods+timerPDF 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_off000105c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 10436 bytes
SHA-256: cf29a7e78e773d7298ee9d44e231c08180e4ecd3958e2b01a0826278225523f1
font_01_sfnt_off00011d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D84 17332 bytes
SHA-256: 5d4bba9eaead843c39aad813f8d91fd9e3b7c0a483c730e385ac789d4bb9c4c2
font_02_sfnt_off00014aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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