Malicious PDF — malware analysis report

Static analysis result for SHA-256 282728a26bf2cbec…

MALICIOUS

PDF

75.7 KB Created: 2021-08-10 09:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d323a7e13ce6a7f78541af8b7f695c08 SHA-1: e9c83bdfee6740ef8617061af82ba19ca3b0e8b2 SHA-256: 282728a26bf2cbec7cb6ea22776c0db9f5136a26fc9bf47ef01770a00b31c336
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 pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98dd25ec83---fajuj.pdf In PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844c054f7b4---mudoduda.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/26570020904.pdfIn PDF document text
    • http://absigorta.com/E/file/gaxezuduxo.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/59802103662.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098e0873856c---36991382575.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/juwijarepobijobavo.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/210405276146.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/lepavopuponidabekas.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/4720667866.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094903b53681---15404473896.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094138d5b89b---nesuzitadiva.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/5672744822.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b621236b74d---kujejikodeferasi.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/14892633669.pdfIn PDF document text
    • http://dogable.de/userfiles/file/32327973631.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093feb0e9c37---16968230580.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210601170423.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/311dedab346f5f14314e64bca4c094e4/16297415428.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c901a2a25cf---1561913944.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/dofoxi.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/tegodakoledixo.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954e94497a5---89415538371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=gesipa+firefox+2+manualPDF 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_off0000c28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28A 10780 bytes
SHA-256: f495bdfb9d2dd81cdeaa1ef2391d1848b475b89590d37a8d999e85cddd4572b7
font_01_sfnt_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 17032 bytes
SHA-256: e1e58bb0e10fc6742e6200c595377139d84bb5cd4535ad1731365a64428ff93f
font_02_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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