Malicious PDF — malware analysis report

Static analysis result for SHA-256 048c898edbd95f53…

MALICIOUS

PDF

80.2 KB Created: 2021-09-13 07:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c3de1c0ab7121d2b4324da055dd512e2 SHA-1: e022b4fe0da7b3d5728d73071bafd1fa09e446ba SHA-256: 048c898edbd95f5310a66c9faabaef787fb3e12bf899056ecb31fa80562e1032
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://aaaxxion.info/images/file/rorerezonalubaxodimaxi.pdf In PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/vipobilunevasumep.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a65b27cc7c---66820191047.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/zunafefofusasakof.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/35487940282.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/natibuzudez.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/jipimigixoxuj.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/0ooiiecuhm1e9idqlk95hb3ujo/jexapexisomotanu.pdfIn PDF document text
    • https://33mobility.net/uploads/files/radovewasileraxudoke.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134733a80073---bikobisinipig.pdfIn PDF document text
    • http://qdjshg.com/files/file/97447848427.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109130105353350.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/juzuvexitupupivixube.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/27609701415.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/52048501626.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161336be4cfe0f---47126739753.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/sanexofixevatumu.pdfIn PDF document text
    • https://blogsma.com/files/bosuneniximozufisof.pdfIn PDF document text
    • http://fitviewer.info/files/file/68668177689.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16135eb828dcd6---gopivoxomopazuvi.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/25416152108.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/67687002937.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/c125c55fae166de131a19d5fb95bd644/sosemebigimefutilaredup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=combustion+formula+examplePDF 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_off0000d457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD457 17628 bytes
SHA-256: 9f14d6cb899eb68ebd7c8f632a97b56b17d50b058191ac7a4485dc7663db3b24
font_01_sfnt_off00010207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10207 10892 bytes
SHA-256: 69a341eb60a321486a6ff82f659b5bcccdb90ebac48a224bce9944b992600b76
font_02_sfnt_off00011b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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