Malicious PDF — malware analysis report

Static analysis result for SHA-256 d143b02e36b24062…

MALICIOUS

PDF

84.2 KB Created: 2021-09-08 22:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 002b2ac46668b6888b54a9efa4ca47be SHA-1: 29d30f618a3cef781cd75dfacb409963bbb86721 SHA-256: d143b02e36b2406276a3f0dc4db4c2a465333b42dab2216eecd8abc46f724dd8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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 https://www.igescanada.com/ckfinder/userfiles/files/20290845379.pdf In PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/dawovago.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/tiwugejubabefimejeguletek.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/52590038905.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/61675159718.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/torutuvibuxawo.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/99141376398.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f72fdcfb7---renijetanivegukisomog.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/siwapevelupog.pdfIn PDF document text
    • https://oferta.lt/i/File/seroraw.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/55659556705.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/16886485049.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/50238807673.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/6119954061.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/52384725200.pdfIn PDF document text
    • http://innersolutions-uk.com/file/nerelumiza.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/velegarunakorilijebeledi.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/zosikafopek.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202198928532560.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/84390943782.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/zewerirulozofewitu.pdfIn PDF document text
    • http://prompol.com/media/file/vulupikujariwug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=display+mirroring+firestick+androidPDF 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_off0000e19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19B 11172 bytes
SHA-256: f3a9b9bbd90824e3abd081241287944a9fe52e6d4fde20d49b280697c6961d9e
font_01_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 18404 bytes
SHA-256: 8cba6456a7a95eb8c1b0b83e0f3d5a8d227fbf0210a89cbb5db57b2748665e6c

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