Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba49cee158053342…

MALICIOUS

PDF

75.3 KB Created: 2021-09-19 12:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d4722297b2b58aa7cec14db6d61180d1 SHA-1: 8bd6a783444e922a1f0ed376862057d46dd22ee2 SHA-256: ba49cee158053342d12293cfae640a4e2b5bdce7e5995f7874eef0c95749ffe5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to trick users into visiting potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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://parc-hotel.info/file/3660428189.pdf In PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/df3a111969659ff70c269e49591c8ba9/88533419365.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/fokepanubomijakiwiwafu.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16142366060ae5---bugozavasuwiw.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/vuzijeloresatot.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3a0062aac---87687032841.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89059133309.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/sugemavuxazivaju.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/74366274046.pdfIn PDF document text
    • http://traviet36.com/upload/files/tadudugaxowedatuvazawen.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/2554206334.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/1115706763.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/buxamarabipazikafawifatu.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210913142340_1739037110.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/xobumegawajisalin.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/62686283254.pdfIn PDF document text
    • https://j26clean.com/upload/files/64114967358.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/3590771148.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/81583718006.pdfIn PDF document text
    • http://hjhchem.com/upload/files/lelufugatig.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/zulelajumetilokag.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9442dbb17---noleminiparipulizidawa.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/guwamofi.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/4061c235cd0ba542333ba60f7e6fd15f/nolulenunasexibabiferakep.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/rupubevikefofamigu.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/bifovejepazuxuzirez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=russkaya+klaviatura+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_off0000c26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26D 17500 bytes
SHA-256: 843390e052ce1f3c3c729c457f98aa899862c71af44319ed659eaf167a87d3b9
font_01_sfnt_off0000ef84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF84 10528 bytes
SHA-256: e8b105b62a7b6a67d95bc49fcbf9df65a4697c17b23a6bed564dd783b4b1c800
font_02_sfnt_off000107a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1