Malicious PDF — malware analysis report

Static analysis result for SHA-256 b201ba16701cd9e7…

MALICIOUS

PDF

76.0 KB Created: 2021-08-15 12:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a2e98290dd2b3da7afa263d4e8c53a9e SHA-1: b25fbb2c8fc447f351b049f77b68338acd2aa429 SHA-256: b201ba16701cd9e704e349fb9e6326c0af1ff12506b8eec92f699e0493797c39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious URLs. The presence of embedded URLs and the structure of the document suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=cooler+master+storm+devastator+mouse+driver PDF link annotation
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7382616d2e---15292173193.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ou1m54tpcfk54r3ubmn86njbp4/22222645177.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b663646c1e5---dolajerif.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91f593834---zekilamul.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/aa836fa334fcd62b8962ec91cace20c2/90601504474.pdfIn PDF document text
    • http://k1a.ru/images/files/file/3585318171.pdfIn PDF document text
    • http://chineseclothingonline.net/File/dilomutafetadojuseku.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/wituwavebigiwosiranos.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/56895968192.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/37884367947.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fd29b4dd75e---39936390710.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cec875007---benoxatevobikodoji.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/42760566116.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/6c0ed0d7a265cd62a24cf2bb082b5ee8/75393964449.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/51625688190.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/33718471610.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/28645656779.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/ratowexonedofekof.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/2827018681.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607305a51ab83---3147881207.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d9390e6f45b---16573903736.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/68263209783.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/vemokibuni.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_off0000c279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC279 10500 bytes
SHA-256: b2173027a434b30f987845b00dc0ccf61f660bd11bc2b819bcfab6c8139d5ef4
font_01_sfnt_off0000da6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 17324 bytes
SHA-256: 0049d7827a170af315082a264c4e84ba5fca4cfd3e7ba2bdd72a7170b5c46ca8

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