Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ea07eb8c00ca7c…

MALICIOUS

PDF

86.3 KB Created: 2021-09-05 17:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87cbc2002a661453bd50c1e947879fa3 SHA-1: 88c4a2b8f22e13dff9affa23ee911730034d52b1 SHA-256: a6ea07eb8c00ca7c1b485aa4ccf61a242f13a26aa481772a95365eeedffe110b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or phishing for credentials. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=pdf+translation+from+german+to+english PDF link annotation
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/op46gaqrgslb06eb4k2veuh0ad/kovozosejuku.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/77680420291.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/df62c68d172efcbeffff83e68630f3c0/78159399541.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/20462267074.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b63c4da0276ca900bed32ce9ff57ca22/89166728384.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/hnkf1dbavq1kongs361kgc949t/48612329151.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/sofasovud.pdfIn PDF document text
    • https://aquatim.ro/uploads/files/97662877330.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/savevabijikanazurazud.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160861bed6cfd4---32490955750.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/nanazagowubelowupigepubu.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082e2428e1a1---84912572842.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa597ba0875---toxelogu.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210825085311377.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/43558847396.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/59128193330.pdfIn PDF document text
    • http://bakoca.hu/files/file/nipipawududap.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/89768852675.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/rononenokej.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/05vh2vmljjr0q85glhkh1b0n98/dewosadekiruxaba.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9b6aa483cd---lirotubuxazudup.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c93e9a9fdfaf3ad5deb6a417bfa34409/74624837125.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160b74bd8ec6ac---nelezopiv.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/46346043449.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/lugekitoguzutoxizixi.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_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10800 bytes
SHA-256: 403579a629a61b4c90fa809102f2e42f0dd6355717b44d1b7015b2970d081fe3
font_01_sfnt_off000104f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 17972 bytes
SHA-256: 3638a50d41887f25e14cb246de041cf580b9628060a3953e4bdb2ccfcafb91bc

Open this report in the interactive analyzer, or submit your own file for analysis.