Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d45a2df5768462e…

MALICIOUS

PDF

95.0 KB Created: 2021-07-31 13:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6e325f9d2e15ec32bd03d0d2b9689c11 SHA-1: 7db04fe2b4946a349549d3f4a5875d1766a761b0 SHA-256: 5d45a2df5768462e30ffcd53cd9b53b1863520612fff3085808e351d4b471a1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://allytemp.ru/uplcv?utm_term=how+to+get+job+contract+copy+online+in+uae PDF link annotation
    • https://ebal.ro/app/webroot/files/userfiles/files/gojasuk.pdfIn PDF document text
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/furefuwimokadisobe.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/dururasijosap.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/1hvmt1ltshpgbkpu10mtbeusuj/murijijenagen.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b074bf5c099---83160475298.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/meretisudowa.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fexufoxebavudunedipi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079b9b006438---93022410145.pdfIn PDF document text
    • http://skikk.nl/app/webroot/files/userfiles/files/pewigopepaxulid.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/tabaxagomejubixa.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/pinexelodikogenukijal.pdfIn PDF document text
    • https://everestart.com/images/stories/file/miwifu.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/4972411790.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/980550184f4ea158c5848e0771e41f91/22754579619.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/lezebisumulivaj.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/f1d5647f77788f337bc0fd715e91e54e/beririxelusozux.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/92175537478.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ef75f18ac---20840558652.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-6/20210706170952837175.pdfIn PDF document text
    • http://mega.kz/media/upload/files/tejaneradedifemurulu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094276e762c5---86558952551.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210605201442.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_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12553 10940 bytes
SHA-256: 61a01327888369f4c4792f0575625d30ee1fcd1f6654881948c58299e148a88a
font_02_sfnt_off00013e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E98 17652 bytes
SHA-256: aeb4a014a0f4358da535acc795e56c28971e8e3661b123bb215c699ba43d4592

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