Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed13ce642395ab7…

MALICIOUS

PDF

82.6 KB Created: 2021-09-03 07:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 712fdce691975136f37f873c5a2c6ebc SHA-1: 1aba2796852f13482faf1b96bfb8b731392f58f2 SHA-256: 9ed13ce642395ab7796fbe10a7f3e9376fb8fcd1d623af74ad81e1da9844f495
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with several heuristics indicating it functions as a link farm. Notably, some links point to compromised CMS upload directories, suggesting a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://ladispensadicampagna.it/uploads/assets/file/kariperekamo.pdf In PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/rozarepelig.pdfIn PDF document text
    • https://hotelcorona.ro/files/30504515492.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/80294596015.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adb5717a2d2---81147345569.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/dpg0akfhh8u28q49k0cui7hhck/97229653876.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/40097170618.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/pazejime.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ad8c8213543c398827b5e648d6a5d8f4/34804393186.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/33374708950.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///dunumofetanevebereselem.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/96021425669.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/towediparosit.pdfIn PDF document text
    • https://seikico.net/img-tym/files/muwusejumemukukopila.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/waxew.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/v4msgfaapfrik3bhrep0ved7kv/83562706286.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2d6e304f8---39305008403.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16107f0396550c---65199210924.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/2jkd6pf6flpfou0scc712u594m/xaxegub.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5933171f9e74324fab7319a91c611bb9/netizolegerosekugavome.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/sifirakajufuvibag.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/saxiwujaxujot.pdfIn PDF document text
    • http://17njl.com/userfiles/files/takunuminivepeliti.pdfIn PDF document text
    • http://packamate.com/userfiles/bexupebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=game+design+merit+badge+pamphlet+pdfPDF 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_off0000dce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 11004 bytes
SHA-256: bd86dc982ae287daa07e192e6968dc16238113826cdd910a3d16129f82de891f
font_02_sfnt_off00010ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDF 18076 bytes
SHA-256: 3595fb44b8561b2738ba305ba2b328a19ff4b79605a7b50cfd55b63bea7296f3