Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2e5235669c8dd2…

MALICIOUS

PDF

85.9 KB Created: 2021-09-12 17:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 92284c4abac0f040b5cea92f2e14b937 SHA-1: ea6850ddbea3cebff0e8ad90ca8b00aea1a84fae SHA-256: ed2e5235669c8dd27581ce78d9e329b2b4a662450a8a8743dc84cfd7799bd105
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

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://archism.ru/uplcv?utm_term=my+hero+academia+anime+free PDF link annotation
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/zafidufat.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/56246251563.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/82519280849.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/13436048602.pdfIn PDF document text
    • http://tion.hu/upload/file/xejidazajevipogubifobezid.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/kemamitigote.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/76291736829.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613569879a0bf---pumimige.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/lamusukezoraz.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/75811789136.pdfIn PDF document text
    • https://masukpt2.com/contents/files/19461504327.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/72920587057.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/seneloditajivoketa.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/bojizabinatuvepeda.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369cc5ee104---xonuvijivamif.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/26605837350.pdfIn PDF document text
    • http://dothi.info/images/files/bemoweverekusebo.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/sofalunolufipenubovisupez.pdfIn PDF document text
    • http://elsped.hu/files/file/5731652497.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/86172109765.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/95970277748.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/37610402156.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/xokuvo.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/68850778055.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/nawubas.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_off0000e414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 10536 bytes
SHA-256: f5d03d559b80b0faea63f415f5e2a804070855564b11ab612d27cf210aa66dc4
font_02_sfnt_off000113f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F7 20288 bytes
SHA-256: 7a5aafd10bd0c5179d00207cd6114d102bdd716179d49c16a6a1ef2c0d4756a2