Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9ba956d3dbabf4…

MALICIOUS

PDF

94.2 KB Created: 2021-09-16 10:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ba1f6e080f1d845fb928b4f7438a9f34 SHA-1: 808da15ce1398a806c3df97226f66405eb637440 SHA-256: 9f9ba956d3dbabf4f7af49a99bec73c25f3e5db6add758e5b674171b0a18a9a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm heuristics, indicating an attempt to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing or malware delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=everything+about+her+full+movie+123movies PDF link annotation
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613441f44b003---27177418746.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/69360504181.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/mufawibunebizumimetazad.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9ab686dee---sifugotutadopowugeb.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/16501900662.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614015f7510ef---80827506465.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/goguzomanufepoxiz.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/1c1523dd8309add29b16ad90e4bf8b5a/jukatigim.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/kujosin.pdfIn PDF document text
    • http://mayingiabao.com/upload/files/14743525958.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/posilafuraxeravobemivek.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c4e2cbd00ae0e2731000e785f916b842/paloxagakixazi.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/sokujagak.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/lanefezane.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/62035178920.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/pefilugupajilegi.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1630618026.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f01b952666---dilokuxunexavuvi.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/40537257197.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/dasaxogesu.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/99310692866.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/f9d7be0523180aa62dca1a875c4ed30c/3638726658.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/61222736276.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/xanubopekekevetikefefum.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/pijivudubewiroxovu.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/94448240375.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_off00010c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C13 17228 bytes
SHA-256: 054e15310867f1eb04cec070fb3ed1bb86260c5cd997b1bbd0cb2b03c371eda7
font_01_sfnt_off000138c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C6 11408 bytes
SHA-256: 17ecb3a985b0f898b37b8b2a2383b43261ad2ee31292932f2b53c4ce6ffb3506
font_02_sfnt_off000153a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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