Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2c52411ca414ef…

MALICIOUS

PDF

96.6 KB Created: 2021-08-13 18:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 9e430bfc4c19443e15299428b501323c SHA-1: 0319016f62f7f6e96f72a33c84d796aac0998623 SHA-256: 0d2c52411ca414ef07da53b0096bd9b38f0c5886f18eac33a83bc6d860d2de3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://hongdacable.com/d/files/vodasavopugo.pdf In PDF document text
    • http://kameleonhastanc.hu/files/file/42396894982.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/21272004225.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/d7340c7f5cef12de4fb9f059e4928b42/31485042448.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210707_123AD0FC75C660CD.pdfIn PDF document text
    • http://pattersonandoliphantfamily.com/clients/875492/File/53823116799.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/lv569srngad5ih0deti0cnfhdf/78248107984.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b31d509de1a---lejekidilu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160956b2664a46---juxivegabevixafigurix.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caab1b502b---gagusizixo.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/3253615821.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/27999436712.pdfIn PDF document text
    • http://ccadl.com/files/20210714110219.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/144283fc489dc4fcc6bebda422636fa5/88973545043.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/sofizefefiganugeso.pdfIn PDF document text
    • http://fructusartis.com/i/File/belaj.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/6vbs42pdfjfokiql1ipkpi6if6/kodoxevi.pdfIn PDF document text
    • http://temple.mo/userfiles/file/nesupemikapegezinifuzo.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b851ab79a02---gimos.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607731ae5c4ce---19060173091.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/092f9218913e36988ec0606aa9657139/nomadibuvefopixew.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/barukezonigakanuk.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/pukozawusiwad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=diagrama+de+flujo+conector+fuera+de+paginaPDF 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_off00011156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 18468 bytes
SHA-256: 530b9c8799191cb28bfea244537860a9760a8ddc62dbf246a76f33acb65810d0
font_01_sfnt_off00014091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14091 11024 bytes
SHA-256: 5e55325f4b2b7bc2a133323af91a4e775a2c5a992ea3e460aa472985d6a3504e
font_02_sfnt_off000159ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1