Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0389945d1a51cd…

MALICIOUS

PDF

72.6 KB Created: 2021-09-16 00:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7d995be398aa73b2e83f45f0e6402d40 SHA-1: e5d48b8c65a09fcd66051164f3f5945e330ba3b4 SHA-256: 6e0389945d1a51cda65d68839af340a2e13a083b0e41277398b0238de166b53e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=instagram+android+ios PDF link annotation
    • http://astprom.ru/sites/default/files/file/94272186329.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/11937108447.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/76585178445.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/gezirigevab.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/16544559027.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/81144016380.pdfIn PDF document text
    • http://orenprom.com/img/account/file/19247019310.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161358e835f925---23293373633.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/6947432291.pdfIn PDF document text
    • http://lagrupacio.cat/file/10424988082.pdfIn PDF document text
    • http://tradotel-riviera.com/file/daredotimajani.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/61563938672.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/42247325409.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/36303438678.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/24350915727.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210910030353595966.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/36948438859.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/42251374803.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/8759622439.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/dopawemupokizoz.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/60271491751.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/zujogovutekapijuxufili.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/71456741664.pdfIn PDF document text
    • 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_off0000bc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2D 16228 bytes
SHA-256: 91128c180311bbb1ed74af2ab282b79b578948cfe6c3dc853ff936112333e03c
font_01_sfnt_off0000e628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE628 10364 bytes
SHA-256: 48ab1359f46aa374629ae3c12293f37115b8a30f3f002d0e9ed64521ba16c0f8
font_02_sfnt_off0000fd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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