Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2abd7947f2782a7…

MALICIOUS

PDF

82.0 KB Created: 2021-09-17 08:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9834a428ef14feef1b3d139a88c6232b SHA-1: b22a2fbe62b2b13dd6bd1af8a651320247342ea2 SHA-256: c2abd7947f2782a744e39dd424a13cd2d58d3d85fa4dfd533a2acf4898e8c932
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to potentially compromised CMS uploads. The embedded JavaScript likely facilitates malicious actions, such as downloading a second-stage payload or redirecting the user. The presence of numerous URLs, many hosted on disposable domains or compromised sites, further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d1573aa10---23146296425.pdf In PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210911_51C9D9A249A4119F.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/79076089597.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/60310309496.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/gevurok.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/sozikikesojegawolilapaf.pdfIn PDF document text
    • http://qzgj.cn/upload/file/28249557208.pdfIn PDF document text
    • http://netart.hu/userfiles/file/53835310054.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/vanotixaxakuzebi.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614090af5c76f---75586859558.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/wusavoxuwofezolibepero.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/66289612129.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/83391564362.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/71449624105.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/devakuzas.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387036269bf---ginejetapigoge.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/vapagitow.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364904d2273---zamedawagikazexexaxefik.pdfIn PDF document text
    • https://linker.tw/files/27153218005.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161426c1471c38---raguwita.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336e5e848c0---fitux.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/fitunajewuruwanisutiba.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202197656484937.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a7e0572e7---93794146.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+viper4androidPDF 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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 17572 bytes
SHA-256: c1a929ad419c7abba11e15734e305f783162a3471876c3427eb17762da8ae979
font_01_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 10580 bytes
SHA-256: 30931afed52e3b62a3b250fa484cb847dc7f37590fef468d2a84b643ac2762ba
font_02_sfnt_off0001228c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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