Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b059ac604e1bc6a…

MALICIOUS

PDF

80.6 KB Created: 2021-06-28 04:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 1109947a5a67ffd5b268e4bd23d06bf4 SHA-1: 3d9a24ade90175c6e4530803e7d0fb0009423103 SHA-256: 6b059ac604e1bc6a2cd8fecd9a00b34b0896abb7cabfdda43bcf3f379e12fcf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://xistenze.com/files/files/zemomerozegorarazomuga.pdf In PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/tabigoloka.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ee2cca63379bc6c67a1181964c2a4425/lowanijimafiju.pdfIn PDF document text
    • http://www.bandungmesin.com/file/25155938158.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/40287073405.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/65c9350fa27fbe5789bb2c7c9afea1ce/zidaketumoledimepovu.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/57037216797.pdfIn PDF document text
    • http://planbmedia.hufiles/pawodiganuvedi.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c792f9ff---68809709709.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/652aclpret2l9fogvjkqcfvuo5/fefivupakab.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/84633c26ddfb7d16f47f41e943a85f5b/zexojuwerad.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/qhlkhnbpq1d91ir1c4alm02pkl/14136710044.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fca098f308---sawomabiwovoxagus.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/38878192955.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/9948332462.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/87ec03acdfd9ef411695168cf66cc124/bajut.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/padatavopapikimefulojoxa.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/55046499316.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f56aa7814---sigerafugezijoro.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/8adbc664c70410486f011e5d5947a2d6/jonuloxusanonaburuxojotep.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1f792ec1a---wupuxakujokoroxifeketed.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/eu61366qnjic0rhilla4heju42/25417289226.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/dudumopuriderikum.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/e735c5184fc838e8b4a7dff3ae00b5fe/2557273119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=acrobat+fonts+not+displaying+properlyPDF 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_off0000d6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 11028 bytes
SHA-256: 9533bb19327ba5e0f8ccad33f8b5da8e8487b10ff9ebe5409dae19c0e818830f
font_02_sfnt_off00010865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 17220 bytes
SHA-256: 5e17e70d4eadb84d0ade9011c9a53cc20cc922240930d2895ca3d08f730550a7

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