Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ed033e60476644…

MALICIOUS

PDF

80.7 KB Created: 2021-09-17 01:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fcaebeb4afb849e8bf675c9c2c8fdfc2 SHA-1: 29d94e2c07829f849a4f07661aa481f2fa7cdf1d SHA-256: 29ed033e604766448955c69d882d203d728afe5fc8ff93525c4aa81a0c14e3a3
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 identified as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's purpose is to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/ In PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbc2c211c0---rexopiledujuvijoti.pdfIn PDF document text
    • http://rayer.cn/d/files/zowukez.pdfIn PDF document text
    • http://furniture83.com/upload/files/tolaroxawef.pdfIn PDF document text
    • http://opsir.eu/files/file/63318691822.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/66389136326.pdfIn PDF document text
    • http://longtra.vn/userfiles/file/punametibubufitaluze.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/84615517683.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/xaxanefikoravafabobogev.pdfIn PDF document text
    • http://nova-auto.com/upload/482750840.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/mijejekudawidinul.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021090416154073499.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/begexakagosijixonanopezip.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/zujafozavakewamuvepenigo.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/81855920015.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/girarunoviropexireju.pdfIn PDF document text
    • https://123natura.com/stockages/files/pogigi.pdfIn PDF document text
    • https://sadex.pl/fck/file/65967339901.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/zujowevinexeguwomasas.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385c92d3d3d---71792372116.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/50448929182.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/18029988115.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/38639106143.pdfIn PDF document text
    • http://letdentalab.com/img/files/zijaderiwutix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=madness+combat+4PDF 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_off0000d5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F1 10504 bytes
SHA-256: 98adf1f3f2264984646685375a384413c685628c5bc588da9e5996a81d58725f
font_01_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F2 18088 bytes
SHA-256: 9953b2f9ebe6995bff65e36fbba1588fec463039c91829819ed7e94139d405a6

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