Malicious PDF — malware analysis report

Static analysis result for SHA-256 c049297190552627…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 06:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bba75c4c34ca7e89b654067a3a4195ff SHA-1: 87d78aa1d631377b4c8755e7717f5e5948c0db4c SHA-256: c049297190552627f7d557fa53d7a50667f6d8d3f85173f7e84bbaab4450dccb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are characteristic of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.oe.com.tw/ezadmin/ckfinder/userfiles/files/tomepofabegadepofivafune.pdf In PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/4142335947.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/xirusipukotajas.pdfIn PDF document text
    • https://nhorizontours.com/userfiles/files/99952778944.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/49871696306.pdfIn PDF document text
    • http://ccshecea.org/upload/files/43970108061.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/pebobibadidobaso.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/sibilonerijiwobibegal.pdfIn PDF document text
    • https://craft-personal.de/userfiles/file/fegij.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a742074119e---31428676920.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/dunowajonemagijedapilev.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/uc1mndp7a9os0or6fi1202c797/jipuvena.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/mifet.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b32adc0b26e773f403fc47c019cd7f33/66773596769.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948dd190eb8---binebinunalakovabilu.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad39a899816---ratodapurafafopoke.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/23969460365.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16222964092208.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/zisamepewilelomo.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/rl8gk1sig0mt6gk2a0hf97dff5/levinulipo.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd35816e81e---kipezugode.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/78369000507.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/tibukuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ricoh+sp213w+printer+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_off0000d9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E9 16020 bytes
SHA-256: 70a8e166fefb6b89f776c30e138e651c845516895a99f6fff53c216dddc786de
font_02_sfnt_off00011b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B24 11212 bytes
SHA-256: 9fc2509997ab196b7d4410bb812739eca900d4f731aa954aff438bf072f61a81

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