Malicious PDF — malware analysis report

Static analysis result for SHA-256 3224b70b9e8b31a9…

MALICIOUS

PDF

72.0 KB Created: 2021-09-30 22:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01db8270283c7db693f6d420ee4c61ca SHA-1: a8ceac4e64063aac2b5c1223052a6a3e0862d10b SHA-256: 3224b70b9e8b31a91988f02e4efaf8d753693d2ca87a5c8c1cba6e9263851581
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of multiple external URIs and link farm heuristics suggests an intent to redirect users to potentially malicious content or phishing sites. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://rocb-ap.org/file_media/file_image/file/babosororavenudekigageman.pdf In PDF document text
    • https://semut73.com/contents/files/tazomo.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139008d79ba0---22416349297.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/sasopila.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/guxabipiwexomefinorebiwas.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/xozapoxagipudirusoz.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/15784546277.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/67146082417.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1632384520.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/masitusojilotexagakofi.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/58327618790.pdfIn PDF document text
    • https://kor.mycultureis.com/FileData/ckfinder/files/20210928_81B1877A180E2004.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/dorowivowofipu.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/62468674972.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/37539639158.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/bivem.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613603b02dd0c---96623363228.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/20089407008.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614e68c578e9f---52817997323.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/75854671475.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/pipilupo.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614caf510377e---35172676480.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/texadonelevamuxa.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/degubevowasidanu.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/tirem.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/78126882575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hillsong+songs+free+download+mp4+audioPDF 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_off0000b565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 10996 bytes
SHA-256: 8693d2fac9ef5cadfc5f3fd96188cc3cf13711f1d3a86e89092ff49a3da1e8c4
font_02_sfnt_off0000e6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D5 16916 bytes
SHA-256: accc8623d42285398d1f2459d854c5586bb1a7725f8b3c12cd7c70d5b8f44d9a

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