Malicious PDF — malware analysis report

Static analysis result for SHA-256 95065ea37867cc30…

MALICIOUS

PDF

68.9 KB Created: 2021-09-29 02:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 08e1be3e2edef3bd750bf5da41915705 SHA-1: 83629ae280810d9b2b4b4845fa6759ed9097627c SHA-256: 95065ea37867cc30840ee577c3260a04253c0c22b8085990c0cc45268e81079b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://dpsnowodworze.pl/userfiles/file/95886612746.pdf In PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/3307699fa8bf302e2490186c60fb1488/60666869781.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/vosejubiz.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/44669745969.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/mixosozidinoxutojak.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/97340899326.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/xegutaxaxusanal.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/3752716354.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/74507585944.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/chrpmvsa6qb2g2jovs3nii7d2q/73884491768.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/xuliluradedajadir.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161311ff212761---12987302021.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/50272505063.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/pepuwajeb.pdfIn PDF document text
    • http://strap.sk/uploads/files/33570719303.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/50847758926.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/sopelenosuxabupanitoju.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615149737f710---59207874551.pdfIn PDF document text
    • http://tiquital.com/documentos/file/22436799056.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/bagatan.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/netukubezobu.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-29/20210929060211878675.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/11988355522.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/161325bfa88f11---gadikomivazixuxakuz.pdfIn PDF document text
    • https://yasacompany.com/upload/files/22978019126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=adb+driver+latest+version+downloadPDF 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_off0000b03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03C 14928 bytes
SHA-256: 66880dfca99f389e69fc9f8ee38154b81436d3d922596652c57614a3815f4db2
font_01_sfnt_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 10516 bytes
SHA-256: 5f878f01d6542160b7d217e00a75979fd8d90ff481c9377945b583a999e1de4a

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