Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba2db08680ab8a5…

MALICIOUS

PDF

76.7 KB Created: 2021-06-28 12:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6f6ac1593b376d45e80b4f8ab25ea516 SHA-1: 98096bbd2a36f6c636b25466a1ca3af13bc30243 SHA-256: 5ba2db08680ab8a5a2588bf775bf62cf41e5176aab7280321af875bf634eac41
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm hosted on compromised WordPress sites. The presence of numerous links to potentially malicious content suggests an attempt to redirect users to phishing or malware distribution sites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/2ac81e982e8306f38afa48abe5e87c7f/25236472126.pdf In PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2606562cf1e75c59ae4baf3451d6a2a4/75697910948.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/78359819485.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/imdsdrqnf2927pcp3mipci84he/dubof.pdfIn PDF document text
    • http://juha.be/_files/file/dubajudekawasare.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210528174337.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/abfa734be9962beb16b41c22836026e7/sesuzi.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/f08edd40af43ee6ab4989d184477b05e/wutigumujifavozerabodekur.pdfIn PDF document text
    • http://www.bandungmesin.com/file/wovuwoze.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c42faf332f4---14257887903.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b322112dab---57949727359.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c6f711f06---69653723800.pdfIn PDF document text
    • https://windsbs.biz/files/file/40120168555.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/fasumadaza.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/42dfde2194b6d7d0a8a540577c784e01/61526662027.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/3f9ad8ce5545a9b8686c61e8b0c482b4/wupimasidawewojapoxepanef.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a880c83e1---4124667018.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/7ddcca2ffa728d382f30a04b03fab3bc/80511221942.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/80972933101.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/85e05de6c8ac780087b3b07315be008e/94568995304.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/63618422181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=watch+smackdown+live+streamPDF 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_off0000cb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB62 16140 bytes
SHA-256: 2f1fc6f9ac32f7d82886a2167d955e2c89b44e79421f943edd93d8fc31c6ad63
font_01_sfnt_off0000f4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 10872 bytes
SHA-256: 85772131a809e8188f48220402586cd7a9db94c2613464186d1481aacc3eda0a

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