Malicious PDF — malware analysis report

Static analysis result for SHA-256 46048096ba081765…

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 08:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6d241676a9074fd23d7a37177f40c50f SHA-1: c64030ffc898ec6be7d68218648280ba4a885b05 SHA-256: 46048096ba081765ea542fef2bbb13c2b3a9c2718965d03abbb4c6170ca294a6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://laborke.ru/uplcv?utm_term=how+to+arrange+apps+alphabetically+in+android PDF link annotation
    • https://stl-log.com/htdocs/cljr/data/files/nasodunowodo.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/risidepizefisipawo.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/pirilawamunob.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/pulurolatekamimo.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210914193348.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/donabe.pdfIn PDF document text
    • http://ativn.com/upload/file/fekilazedenog.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/49175973353.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/90674378280.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/tawanozinako.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/pebeketedef.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/pesovidalipene.pdfIn PDF document text
    • http://aprt1day.ru/file/64602661582.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/xenudevijelajojolag.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/78238944369.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/zaxubudemefivubemori.pdfIn PDF document text
    • http://cartopack.be/Images/file/71554085715.pdfIn PDF document text
    • https://suksesunited.com/contents/files/mebalore.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/dorexeburujirimuzik.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131b166715e2---41294485445.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/99499969097.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/90234091589.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614910fc2d795---xosalatuwigi.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/31984792152.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_off0000aedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDC 15420 bytes
SHA-256: c49304569c2a583c2932a17254042639c257134a1f70e322f857e6738f72fff9
font_01_sfnt_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 11124 bytes
SHA-256: 80abfc8890dd149e4e37c88ddb90953511aebe3938b038388d77b8373595747e
font_02_sfnt_off0000ef3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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