Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0eeb011898579e…

MALICIOUS

PDF

87.8 KB Created: 2021-08-06 23:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2f7b1721a5147f0fc49922fbbd7bba3f SHA-1: d4317a601a2123ee5119e7920ec107b8386a7020 SHA-256: ee0eeb011898579e12eb5faf6b191f9ff3eee70bea0d1045119780c02abdb9c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs pointing to compromised websites, suggesting an attempt to redirect the user to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=latitude+longitude+and+hemispheres+worksheet+answer+key PDF link annotation
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe0d4af192---vamomujebezamesulize.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9169e1222---39577617041.pdfIn PDF document text
    • http://realloans.com/clients/73966/File/39615928867.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/qh5p944dr0enj5e737cpqg7am3/3854803898.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/tagowarakadivosupulufam.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/dumazewikanojakizij.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/18611313697.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/d3102f559c8f7a9357d0f4faeab36ad3/zolige.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/t22dq6h5cev91pte77a70nr1bp/navevutupakave.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/57048396085.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efeefe757c2---jigonufuvewapemadozusajig.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/76888604641.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/45116168074.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098385364bc6---jijaxolujapeneg.pdfIn PDF document text
    • http://realestatemiami.com/userfiles/files/31464590988.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/xubosaredijor.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/xomapijenivudazedexajadar.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/ed6d75ffd2496848bccdfab82f1600b4/nokegexemepudedujotorexag.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/37573831996.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/4620802378.pdfIn PDF document text
    • http://hncastlecable.com/d/files/nimunelububoburisit.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/22181424095.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/96023861466.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/iltisk8iu1a7cq855uo8rdequd/47896597609.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_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E7 11188 bytes
SHA-256: 043ab01f5a5fb2658e1b0546b2d068e8093e0ceb2aebd1168612d562218c91ab
font_02_sfnt_off000122b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B9 17252 bytes
SHA-256: 7a51d37187ffca118b8c6611eccbc1ca8f41081b431841afc686691dba2629ea

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