Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d74776e4097e33c…

MALICIOUS

PDF

72.8 KB Created: 2021-10-02 17:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e40f6b46c96d35a4c65120cebbf94462 SHA-1: cd3b1e898f7a3ae4daa92620f7d0b24b08e20ced SHA-256: 8d74776e4097e33c199d723e4355fa3d78bdc3cdee2387d134d4a793108b28b0
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the sample is part of a link farm, and numerous unknown URLs were extracted, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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 http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/90873106607.pdf In PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/bedogirifobedutilus.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/biber.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/46353145319.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153a14d89653---tixojoxo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/nofupazid.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/31569894586.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/bomijunitarelupofutamajo.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/67808276250.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/uhe4nebpo5ap9dg7ceqpejf2r2/desujazebu.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/ruwowa.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/55691992576.pdfIn PDF document text
    • https://asp2.aiwangyun.com/ckfinder/userfiles/files/guvafalalidumuzulobitiniw.pdfIn PDF document text
    • https://ms2oke.com/contents/files/8810592327.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/68218351939.pdfIn PDF document text
    • http://rejs2013.cycling-recycling.eu/imgturysta/files/biwazafodibo.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/toxozaraj.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/jawurebewejulo.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__6148037A823A0.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/wozorelenudiwoj.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/63381336819.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/nafuxumesiro.pdfIn PDF document text
    • http://haqwali.biz/files/file/buvewufirujoxep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=going+to+the+source+volume+1+pdfPDF 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_off0000b5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A9 11160 bytes
SHA-256: 37240be3888d23f6394465f7d4557d635815f133a5e95869ba7306c02c519f83
font_01_sfnt_off0000cf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 17796 bytes
SHA-256: 46b6392f0122bf765482d55da39bd3c057c17aa5756b9efa5d08f8bf3374d30e
font_02_sfnt_off0000fdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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