Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d32a86fc8851e63…

MALICIOUS

PDF

70.1 KB Created: 2021-09-17 19:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11d89861506042b558d80de6c5a8e287 SHA-1: 69d41cc6dd513446f620b5bec1a3aac3077c55b6 SHA-256: 9d32a86fc8851e6339e2557172aa68620630044417ea66c0c6165a603ad2b3a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or are part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=gallery+lock+photos PDF link annotation
    • http://hkacca.com/userfiles/32955830918.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161417255b5fb0---dabogerin.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/83674880338.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/ruduremubidigisebe.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/34715820676.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/97347403154.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/21828092700.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/janefuwodinopesoba.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143fa23e9e68---45959412564.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139d1551fdf0---60605428651.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021091016050641.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1630617707_3efb6fb12d.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/vavexizofodaw.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/mopusujesisav.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/58062712042.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/37643936540.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614099ba7b7a2---fulokuxonor.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/telalimanerebegi.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/guzam.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/36610255712.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210916024152.pdfIn PDF document text
    • http://12shio5.com/contents/files/subinewuvo.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/9224946386.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_off0000b375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB375 10520 bytes
SHA-256: f162452fc98a7eec9e06a164888fbc6007de75c84e1d787c6b3b0d3b614dd362
font_01_sfnt_off0000cba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA7 15956 bytes
SHA-256: f4aea5c73fe734d74e59219ec9b70447e9ff224035b504cceeac65d1b06baa16
font_02_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1