Malicious PDF — malware analysis report

Static analysis result for SHA-256 659c1ceebbdbd597…

MALICIOUS

PDF

78.8 KB Created: 2021-09-14 01:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bcadb3b73f8b1d92a8dbbf5d73431dee SHA-1: 5afce3e7e13edd224fcf0455420216f5b652bc49 SHA-256: 659c1ceebbdbd5978a75bdbbba428e5a0bd2997f2bd396b95435d80fe0264cdd
204 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external links, many of which point to compromised websites or link farms. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise attacks. The embedded JavaScript likely facilitates the redirection to malicious sites or the execution of further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=how+to+transfer+contacts+and+photos+to+new+phone PDF link annotation
    • http://galeriejacqueselbaz.com/userfiles/file/fuvonemojek.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134e95e298cc---sizosekoxekokasur.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/duzivuvi.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/72740231575.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/u2603kqbg144m86038brvok50u/14493351670.pdfIn PDF document text
    • https://claudiodituri.it/uploads/remolu.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/88351109690.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/benijaxuwujokobo.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbeda56921---mozupavarurewif.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/93833036494.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/lafazaguxefijizowu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/9a173136ff522559da72581aa5bfc336/43187049344.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/30440127086.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/memokivomuvabojiju.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/faxevugugavow.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/27687895434.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/86747224301.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea2e5e1882---wezixasowitawijenum.pdfIn PDF document text
    • http://fivelscope.net/fckimages/fujogowot.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/46245136423.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/lupimaleragifavifiwiz.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/nokaxaw.pdfIn PDF document text
    • 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_off0000ce0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 18120 bytes
SHA-256: d39aabf9449093a90d4ffbf37e1fd1bb53a28b3a0bbead3229c57a43227d9f23
font_01_sfnt_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 10656 bytes
SHA-256: 9f5541fbe50af7767dc7b0881960cadd9aacbb195e4c0ccb47df663c8fda2358

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