Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2393f8074869650…

MALICIOUS

PDF

90.9 KB Created: 2021-09-08 03:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 250d079144d2157c99e2f1b7ddb64ad2 SHA-1: 17287e38c67e42c174c6b40f93742573e1ad07ff SHA-256: e2393f8074869650bed5a2e3341f6f3887a8a57854b35b9c233170ebacc9fc30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the overall structure indicate an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.zochrot.org/ckfinder/userfiles/files/napobulelij.pdf In PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16130c1d3573e6---74654950812.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/lagularelojagivofibizoxam.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/d864dbdaed9d13fafa6d20f340faf3b2/21932045454.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/xevovu.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/24075206310.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/7pab6p5qas4i4fdj9gn8dtdme4/lomexorixegaxufew.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/4336215765.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/54032997500.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/50d132e7d6813dcfee522a3317ce47b3/88918902955.pdfIn PDF document text
    • http://ndt-ultratech.com/files/dafezizi.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/12088765247.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc4fcda191---98773975405.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/06e47f61b88f6a65ed8b7b02ef15bb3b/vemunimodovobexi.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d00b0be843b---setiwidobolew.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m4sk84ro1vf09fcto5hhp1h4q6/99925736965.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/0buolo8f4ju49c1d7ohispmck0/nopozitegosavik.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cca6e2d65---23514214461.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607925ae790d5---54893925148.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210828075237313.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec734daaa1---2068727069.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/jutulasemomexuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=effects+of+social+media+on+millennials+pdfPDF 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
stream_002_off0000fe6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE6E 10664 bytes
SHA-256: cadb207ad4f9c0fba7fe8e47ee79355334e28cc2a759fceba0b79821309c9c13
font_01_sfnt_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 17524 bytes
SHA-256: 7f1005fd525416e2ec47bb6bef69d310567afeab23f4b1e6fc8da91977e65303
font_02_sfnt_off0001444c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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