Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea180a95482a6a65…

MALICIOUS

PDF

79.9 KB Created: 2021-09-14 01:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9e544a4a384476e91f207149f5c7e7e0 SHA-1: 33278b582207067105d367cb087e889b6e04145f SHA-256: ea180a95482a6a652bccf4c9ca8b8c11594d456a37712e3d859bc21a630c5c33
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded links pointing to various domains, many of which are likely part of a link farm designed to obscure malicious destinations. The presence of numerous unknown URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://azseal.net/uploads/userfiles/file/nekozafosifuni.pdf In PDF document text
    • http://rentbucharest.net/images/userfiles/6609658582.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/suwagebitomudafazap.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/13742227854.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/93917427991.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/20502882051.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/japudekuw.pdfIn PDF document text
    • http://profstil.az/userfiles/file/74973067088.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/zewuzewadafajipufig.pdfIn PDF document text
    • https://scalper.ir/data/files/file/kidaganu.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/77885874704.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/49871442162.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/96066438404.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/a68ed4eda2f8eccd53eabc9736b522ba/limarakujiwufezabagipeb.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/15151591845.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/70789700646.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/37378845258.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/15683809555.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/zibenoribiduneg.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/dopigurikevef.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/80371161451.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3bf399769---95225648591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+trim+an+audio+file+on+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_off0000d4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BF 17376 bytes
SHA-256: 11b3e7a3002c162d05fffe1c96cd2db3e59fe6652e96342b36094c3b59efe557
font_01_sfnt_off000101ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 10524 bytes
SHA-256: f6fda4a6bdd6707aff277a81b1ba27aa60e23dcac5ee904aa0920a1a500e1c74

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