Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6afb3f60c5341d…

MALICIOUS

PDF

85.0 KB Created: 2021-07-23 01:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f3c7222e010968b58af72b7fe016f85d SHA-1: fded918974e7ed426af654267f0fbac61160e7f9 SHA-256: 7f6afb3f60c5341d8e7dbda8e888d2be4f73e1c0d23403361f9d37753ac5febe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/kef483m230hv6srkm099i6v9n2/rapopeze.pdf In PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/35caddf73b29fe6df702c35d1cf15350/89823869954.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090968d22ccf---71564226394.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/totametatakisit.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/52450915036.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2f3e2eccd1ee616f0a15c7cb94bfd45d/66475040134.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/33624e1ec76c7b2cf880bfe6826532f7/pivosemowusedafasezelijo.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f120e5339d2---18714151827.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/zizas.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/99335741987.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/32297537094.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/97f9f90ae5bd2710251ee0d34cc866f7/kimosu.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5bcec2600---pebokapebamajejonuzoraz.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/59235305030.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021070409070872.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/30772768064.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be810e79a65---68246700499.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d9fa66cb809a5aab686822865ec4af41/xifutinop.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/tarosa.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ef4son85u02eb5lii9m5hk9h33/soliponudavolunema.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/temotebupuwubiraxex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=open+office+pdf+modifiablePDF 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_off0000e6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 17528 bytes
SHA-256: 852ff6bcd86194c7a03bc1786c0a63cfe19c66f01d8cb1eb40d4092b0ad05c45
font_01_sfnt_off000114b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B3 10580 bytes
SHA-256: e3b520f0fa00ab5decf28fb1fd0b3ddb41334dc1700d73b63d92a407866d567e
font_02_sfnt_off00012c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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