Malicious PDF — malware analysis report

Static analysis result for SHA-256 05598ee2f755b6af…

MALICIOUS

PDF

87.3 KB Created: 2021-08-01 06:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aeb26ca525a0354e2f0aa81916636b65 SHA-1: a68d87ccefb8db618c36828df05f60eeb7e62006 SHA-256: 05598ee2f755b6af6c4aa8c8be80c66236fd48ab67909bb1812264fd3f0db90b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, are part of a larger pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://dcmheavyequipment.com/admin/images/file/mukasekusa.pdf In PDF document text
    • https://contact-house.com/fckeditor/upload/file/53888167284.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/borirarigazab.pdfIn PDF document text
    • http://bluiettgriffinwilliams.org/clients/2/2a/2accc941c041fffeac9751862bb8fe41/File/medulowavepigeziko.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/2da0e1026b4fda182b37aa5121836e96/76551670338.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160997c15121c4---305717537.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/19196828036.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/gilefovonivovuvolipadon.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/2924491766.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/b973362f844c2a7159099a8f21f7f460/nodolatu.pdfIn PDF document text
    • http://armanetti.com/images/ranexufogot.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4883ecc90a---degokegalowatedutazabit.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608528615aa1b---tabesefelomutuneto.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db280a76b14---rizekopadiwopovix.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/pemafavanonalozujad.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/eabdd1ca4434c3282adfca3c9138631f/wazabuwanokogopasizo.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/bulesarudogegixaw.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/98ea86f9762fab4e52c80945ae42e129/62856009173.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d49d7eafb31---18603262246.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/70r67vaqqphf9rcpu0eo0m24bk/55228429561.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/rodapelolusutiwi.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/99773726011.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/30259987641.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a110e01ea77---zifipuronevuzaraj.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/56823765431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+importance+of+artificial+intelligence+in+educationPDF 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_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F3 16636 bytes
SHA-256: 488a25c0734baeaf771706bd031a5334688e9dc59da2f90ed2ae60dcb4b110aa
font_02_sfnt_off000133ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EE 10960 bytes
SHA-256: 553a6968ecaa829fd347eb97b48c6ff25bbb144a6a829c9deb9aa0b55ca62881

Open this report in the interactive analyzer, or submit your own file for analysis.