Malicious PDF — malware analysis report

Static analysis result for SHA-256 98edfc06fc1d458c…

MALICIOUS

PDF

85.8 KB Created: 2021-09-10 02:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a19fdf0268b1208fb629f311f0b887eb SHA-1: 381a75fd961098dd805a7453f8aabed4be2081c1 SHA-256: 98edfc06fc1d458c6b153e731b9641a3169fe3e899f9e2fa1eee4ad515798fb5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable hosting and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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 https://pixomot.ru/uplcv?utm_term=the+screen+of+my+phone+is+not+working PDF link annotation
    • https://radmangroup-ye.com/rgfiles/file/99213998419.pdfIn PDF document text
    • http://wohingltd.com/userfiles/51099548217.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/xoxutumux.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/44744491625.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cb25d3e00---71788592892.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/93301583436.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/210906084724397167klgsc.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/mezepif.pdfIn PDF document text
    • http://www.77ice.com/upload/files/liluxomajirutasidugomaxoz.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/44495970984.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/viraripasuxepoxutub.pdfIn PDF document text
    • http://enewind.com/pliki/file/sonikogogenavedotefa.pdfIn PDF document text
    • https://digireg.ch/upload/gibekerow.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/21277481696.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/mozokitosobovibeju.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/sejibetesodobijufezile.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/93221824687.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/73895972558.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/48567874954.pdfIn PDF document text
    • https://badrivishal.com/media/peberidotira.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/riturajilanukumubijekaj.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138fdd37f443---84145289652.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/dogafowajalugatubuwov.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/89997163638.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_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 10972 bytes
SHA-256: f616c2aa04862bc18c9db933a738ee0000035c0b93ea0add12e4af48e96c2fb4
font_01_sfnt_off000101ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 18020 bytes
SHA-256: a4875cd79b631e4db605453ebc1d745af4a0d9834444707374ae0c26d5b441db
font_02_sfnt_off0001310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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