Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed64a71cab5e6d4…

MALICIOUS

PDF

84.0 KB Created: 2021-07-20 04:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 40c44b31878101acf7a0c8c36b4a24c6 SHA-1: 9542a0aa7e9cd3b5b016d67426bfcefa8df60b3b SHA-256: 9ed64a71cab5e6d45012639ba4343ca99afcbc7f7f80eaf43c9a52de12fb970c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites or disposable hosting. The high-risk heuristics and ClamAV detection indicate malicious intent, likely to redirect users to phishing pages or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://highendschmiede.de/highendfiles/file/62695401198.pdf In PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/67636155847.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/bejugalelagujulu.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/4f7e97033780c7e24d6cd38fe57fb237/92841210180.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0r1d3v5pmsh4tk9s11hnj8i552/75744386072.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/50327620861.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a870e1d55e7---nanotofuwunaxabedot.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/67785936659.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/70900664389.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/19b5738b22146bdf70d21a1fbfaf632f/voxigakaxaj.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/zukejizakuk.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a39b658bfef---50530503141.pdfIn PDF document text
    • http://artside.org/data/temp/file/xodiziwusukibukowuzida.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2aba6214591ba35ae1439904be2d35a7/77036060947.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/l869a60rdqqrivb2ikdu141i95/lomejos.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/f53184f6e87b9787385ea1933bce0e3c/jinigemejirexakan.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/jovesafikopawatunu.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/a13aec166a2ab3c7223bfff9137ff71d/30804935635.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/minibalivumuzoselodit.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210507144928.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/47481259067.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d4df74c21---86656770532.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/mui7u5c48h629i9n5316d8dc65/werafejuzelaburu.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/98251050143.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f160f03a20---fupirofewagagawotib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=mag+254+remote+control+instructionsPDF 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_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 10996 bytes
SHA-256: 744618e9f384ec0a4a367e7a02111f87b2a5e254324a682dee5c918abddc6f68
font_01_sfnt_off0000fdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 17028 bytes
SHA-256: f4e0c6175da03bfadbb09b672f8cde953f0c5a50d0c544b88c425254e45f22cc
font_02_sfnt_off00012a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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