Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe0b4d685def7ed…

MALICIOUS

PDF

69.0 KB Created: 2021-09-21 18:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 09b8fa69038593501ea98f8de0605df0 SHA-1: 423010d44f71c093cbec723220ca192bf8704ad2 SHA-256: abe0b4d685def7ed7d0536be75830851dd655619917912ef8cd0e7f8fc209b2b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of a specific URL with 'download cubase 5 for android' in the UTM term strongly indicates a lure for potentially unwanted software or malware. ML and ClamAV classifiers also flagged this PDF as malicious, reinforcing the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=download+cubase+5+for+android PDF link annotation
    • http://alda.pl/ckfinder/userfiles/files/27175728888.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/sodude.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/wokepopoke.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/majafadoxamanoribanol.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/lezosusaniguratinitivivi.pdfIn PDF document text
    • https://capitolmodels.tuzonanet.net/userfiles/file/2085506092.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/retexewumuza.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/sapepe.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41194518672.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/wufuluzubabadefuloroxova.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/voregaratilomibeniluf.pdfIn PDF document text
    • https://conrays.ru/f/data/gonarakugut.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109110924376670.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/76255292586.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/jafedepupurirojukira.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/fekasavida.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/sotufomufuworokimen.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/mofolesesuvika.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/fefokujowosapibesuref.pdfIn PDF document text
    • http://gugugroup.com/userfiles/pebija.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/fipawopefuworimifibojora.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/51247524270.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109182156036705.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_off0000b14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95E 14372 bytes
SHA-256: 78c4c25dc4d79d18f44b9cc3c2c85b2d0968049d4a8278f8b7f117dee936e19c
font_02_sfnt_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 10832 bytes
SHA-256: c1ac23ae9c43593de0964d168925fdeb3066ff61f4b45f0889590419fb345621

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