Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd7856ac2e4940c…

MALICIOUS

PDF

76.0 KB Created: 2021-09-10 02:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 31b1f45f8101da83efbd475b270c0b76 SHA-1: 3e3efbade8652f03ffc70a7b3aa8faf3b033f347 SHA-256: ddd7856ac2e4940cbc30c447a26a171541bba80ecee413f9c7fc4e51e248c511
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifier indicated high maliciousness. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the presence of many unknown URLs points to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • 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.
  • 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.la-providence-ehpad.fr/ckfinder/userfiles/files/80400368278.pdf In PDF document text
    • https://hurghadalife.net/userfiles/files/fojawoxajibumirugufefagu.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/wigolixuvafibe.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/90403417980.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/41119050803.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/garowilux.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/3693249023.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/tapiwolivasitivokapewit.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210903140000_8yszud.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/roloj.pdfIn PDF document text
    • http://elementyzlaczne.pl/media/file/lasikidukuginigufewubixej.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/deserurejobokunababinigo.pdfIn PDF document text
    • http://merwepizza.com/upload/file/xojazojiwavo.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/zinikaditikidu.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/1459306393.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/87771183726.pdfIn PDF document text
    • http://infosierra.es/images/editor/fevijodivanoxitomu.pdfIn PDF document text
    • http://pb-book.com/user_file/file/36793147286.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f638c36c72---78280297694.pdfIn PDF document text
    • https://promise-land.com/upload/file/91854142584.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f60e969f44---mepafufujadalumazokukito.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/nuzulomerawopuzukuliw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=fb+lite+java+appPDF 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_off0000c652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC652 10068 bytes
SHA-256: 6edb474ca24da5bfb50c1d07a00e597034d297dfa7b884e0b8321d20c694c40c
font_01_sfnt_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 17936 bytes
SHA-256: 3eafd066d93e6f919f540391ffc4aac5a1f4e92c34675bfb7456b1e2eff2b5a7
font_02_sfnt_off00010b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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