Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce2e1611a6d1e83…

MALICIOUS

PDF

89.6 KB Created: 2021-09-04 23:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f22dd48fdf54a6a047dbbd461153a742 SHA-1: 7794b7df52d237cf9761d90e45bbe703a8ca8378 SHA-256: 6ce2e1611a6d1e83b98dfbd90afe5d712665547a20add9ba0aa570e172401a31
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous unknown URLs suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://study-abroad-travel.com/ckfinder/userfiles/file/xuzebixokemigedudek.pdf In PDF document text
    • http://stjconsulting.it/userfiles/files/riredeparorikemamopidota.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9f0013b02---jitavuruxetajiwud.pdfIn PDF document text
    • https://securitydm.com/slicice/file/13110170593.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ebjnpcbqujmal5n59ia48thtea/wikuxazejitelop.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/tidobezugezole.pdfIn PDF document text
    • http://live-net.it/file/pirobuvepofegoz.pdfIn PDF document text
    • http://winso.tw/userfiles/file/86898352825.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078291534949---77447348924.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-7-30/20210730020405962586.pdfIn PDF document text
    • http://parfumland.sk/upl/sonuxigekegojukijofupiz.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/femupubopunebutapibupol.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a627399ab---55318278301.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080b1356af5c---roxeke.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/72962342385.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/81628899480.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/gebekor.pdfIn PDF document text
    • https://anduong-nhatthanh.com/uploads/news_file/luluzirazudizepevoweg.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/29063010583.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/76820279178.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/8455846452.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/94552818921.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/gijebomogetudow.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/1165726075.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/15703985661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=atmospheric+pollution+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
font_00_sfnt_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 10804 bytes
SHA-256: 2c0b6dda84e2fb02925bb005bdbf7050833cd7119baf1bef6fb44fafc1ba427a
font_01_sfnt_off0001122c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 17916 bytes
SHA-256: e31223a98558dba4f2dd90d3110f764016dc94a55f08f474d152253f5d3251dd
font_02_sfnt_off00014090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14090 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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