Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2eddb00d0ff89f…

MALICIOUS

PDF

71.4 KB Created: 2021-09-28 10:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e424fc1a05d0b049e254d72d44ca23a4 SHA-1: 538012b126f7385f3cfd9798adbfdfb187f61f43 SHA-256: db2eddb00d0ff89f8e169b95ce4a2eab6c51834f34ed00eb3eacf050db815deb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to unknown or potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jonme.net/ckupload/files/zanudanomafawaz.pdf In PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16146d1f841af6---kuwurevamedi.pdfIn PDF document text
    • http://pekbdt.com/filespath/files/20210927141232.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/vomego.pdfIn PDF document text
    • http://carszana.com/image/upload/File/27305785995.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/towegevufa.pdfIn PDF document text
    • http://myslizdrave.com/soubory/67315213821.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jovisugujerinufolapelawus.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/lojekujifo.pdfIn PDF document text
    • http://poliinc.com/upload/files/nopiwefizibojafubaxuseb.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/kojinoga.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130fc3e4ec7b---xumekalabiwi.pdfIn PDF document text
    • https://ahha.az/userfiles/file/rifipivodavakidit.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/22621775308.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/43155445259.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/70468124594.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/48422660456.pdfIn PDF document text
    • http://demkapi.com/resimler/files/74821630683.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/talejufufu.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/milawefuluzijesijiv.pdfIn PDF document text
    • https://pr-dienst.ch/file/69738193700.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/36533356706.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/84883717139.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/40732777180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+make+purple+lightPDF 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_off0000b383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB95 17104 bytes
SHA-256: 0fabb13f7d1950af4898f5e7d38c36d3f20f608f54dcca44711c45ee7c73fbda
font_02_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 10696 bytes
SHA-256: af7de3737e7fe8c9c5ced4bf9ea390b7cf59ab2447bef40e0cf89a9bd13d1e87

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