Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a026028a08b6bec…

MALICIOUS

PDF

74.8 KB Created: 2021-09-12 09:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f3e100c802aeb9c7886a2ae3295e7e92 SHA-1: 16955827d196261018e7eb6a6ce7e190f87d1940 SHA-256: 3a026028a08b6bec80b26097a3a3974cacec43c68350425295d51ab8c425a819
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects users to malicious sites, as suggested by the presence of numerous external URIs, some of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://pogologistics.com/ckfinder/userfiles/files/bafoleledafofubaludoga.pdf In PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/46981272596.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/25324491574.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/bewejulunanamopekowuma.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378f4af2822---38663746582.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/pededamedo.pdfIn PDF document text
    • https://cartolmania.it/file/80200765035.pdfIn PDF document text
    • http://topp.pl/_topp/file/18919665894.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/54364402675.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dipanukon.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/20007789362.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/nevapivesujexokanax.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/kuradopodetigevuxuleketir.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/93661285030.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/38659233645.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/77006627234.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332d91518d9---78254880121.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/67571143670.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/85929908433.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/97775831790.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/34749131510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=avenger+infinity+war+full+movie+watch+onlinePDF 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_off0000bf32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD749 10964 bytes
SHA-256: d496d063fcdb025c5438dcabf9e9bc29d1034feb530174b6786fba6a452e9783
font_02_sfnt_off0000f09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 17380 bytes
SHA-256: 898d3e54ec8384fd968b34abf83b1204371de4b4a49f80c857be900173499fff

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