Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae1bd475c069012…

MALICIOUS

PDF

91.6 KB Created: 2021-03-16 02:38:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 27372526dd25a56bd03352b5f13ff821 SHA-1: 3f9a6908d0f54dd10800e4afdd93d40f6b538ff4 SHA-256: 2ae1bd475c06901214e8a70070254ab03b401154888da913eaed9079bf5392a5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=wasd+games+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475000/normal_6046ea906ad6c.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/19441969748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384469/normal_5fcf957760c86.pdfIn PDF document text
    • https://vajilitoseg.weebly.com/uploads/1/3/1/4/131437648/2265097.pdfIn PDF document text
    • https://lavovozanu.weebly.com/uploads/1/3/0/7/130739022/0b6a12a8d.pdfIn PDF document text
    • https://nutakiderovex.weebly.com/uploads/1/3/4/6/134622867/147e55b.pdfIn PDF document text
    • https://kedefakoriwo.weebly.com/uploads/1/3/1/1/131164231/af3008d86e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_600f6108949d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_6035b97c64fdc.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/9269645.pdfIn PDF document text
    • https://vujufosidomo.weebly.com/uploads/1/3/1/4/131482916/2c5900a6e4.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/wuwesomiliredutasoxe.pdfIn PDF document text
    • https://veponigizut.weebly.com/uploads/1/3/0/9/130969631/2151861.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/calligraphy_practice_sheets_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_5fe948c193548.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/401991.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexefobixavater.myartsonline.com/cerebral_angiography_osborn.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/what_is_a_certificate_of_readiness_in_divorce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d42164-df08-4fcb-81ad-69faaf1e0413/lotevovonajadepesusajux.pdfIn PDF document text
    • http://kipazafar.atwebpages.com/corporate_communication_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d2f5c6-9c80-40d3-a677-9002c6218d6f/29112243537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab81d5a8-43e8-4d7f-baa3-9b21af1b516a/dexerasusakimivajonap.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off00011418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11418 5380 bytes
SHA-256: d665d0e05901f4d88c401c6ef3d022aa047abf6d102974ad28e582cf6f67cdc8
font_02_sfnt_off00012665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12665 11296 bytes
SHA-256: d7f96c9000f456a9c4264ef512b7b1b93bf6b13d58c9523ddf1add4c968f2f5f
font_03_sfnt_off00014c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C0F 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940