Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c014788c2a90a6…

MALICIOUS

PDF

73.5 KB Created: 2021-10-07 16:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a4b65b347ba6f1c66156ec7aeedd0107 SHA-1: 8d6d9eae4b7d15f99e89510281c94670b11800ae SHA-256: e6c014788c2a90a6610cbcd01399b8eb783ecf23dc24468d9c8f6a8ee0bd2bf2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript and a large number of external links, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript and numerous links suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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=what+is+non+liturgical+worship PDF link annotation
    • http://vkts.se/userfiles/file/fuzibi.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/90125100389.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/finowamif.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/78345562300.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/42179028834.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/64340430360.pdfIn PDF document text
    • https://cmr.ribi.bg/files/7108900334.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/48922896987.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/tiwalos.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/poxavawotexajitezufifa.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/6717181809.pdfIn PDF document text
    • http://workontext.ru/media/file/dewetomewiwabubowogew.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/47203865139.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/wukobozojaribekupip.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/nigel.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/54515203693.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/41012716961.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1612f95284d542---puxataxogidinapujavigi.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161318e3041ece---12343127568.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/29571419626.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/wekekazavexikapuvujazen.pdfIn PDF document text
    • https://flomogroup.com/upload/files/vomebatakefopiregukobab.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_off0000bb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36D 10700 bytes
SHA-256: 628ee6464736332a5a995f259b9e0843be23350ed0a101769117df52c577b72c
font_02_sfnt_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 17452 bytes
SHA-256: 8c4360fa6ecb7417a464952adb5ed3a9a2ae5b5ea3b9db79dfd3e3be24293bd3

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