Malicious PDF — malware analysis report

Static analysis result for SHA-256 2565e34ab2e6cccf…

MALICIOUS

PDF

76.0 KB Created: 2021-03-04 06:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5e45c0b2aa2b6b5acc1c5ba77042745 SHA-1: 76c3c970689e1cd956855ace077641e9556a46b3 SHA-256: 2565e34ab2e6cccf74f4be40c4108bc4ef1352910f402ddd1459e4fa35239d35
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing or trojan delivery mechanism. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure victims to malicious sites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/strik?utm_term=what+is+dbt%252Fmgnrega%252Fpm-kisan%252Fstate+govt PDF link annotation
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/sixiwas.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/Rgjip6q/53398037026.pdfIn PDF document text
    • http://rubeatyshop.xyz/velowumumegug65b1t.pdfIn PDF document text
    • http://help-bluebadgecenter.com/nuzukk0s2p.pdfIn PDF document text
    • https://mopokelam.weebly.com/uploads/1/3/5/3/135349304/8455163.pdfIn PDF document text
    • https://gitazedekof.weebly.com/uploads/1/3/1/3/131398323/39be4398d86d2.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/eiehijg/melogetimokiwakifitevew.pdfIn PDF document text
    • http://repair-kompov.ru/discovering_french_blanc_workbook_answershhnp6.pdfIn PDF document text
    • http://knitfqph.site/49699965565m1b3g.pdfIn PDF document text
    • https://denudosija.weebly.com/uploads/1/3/4/0/134017010/seluxiro-zazagifawanik-wizukug.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/ijepjdt/hmrc_vat_payment_helpline.pdfIn PDF document text
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/dd91a18e.pdfIn PDF document text
    • https://sikafajowed.weebly.com/uploads/1/3/4/7/134757433/6ddafef48a8ea.pdfIn PDF document text
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/d9f13dd8da18104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gopifu/82456145078.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/today_hourly_weather_report_in_kolkata.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD604 5684 bytes
SHA-256: 12d52c2616529f27e4a37bbee2c32a438954f7e66e3ef5ed4c877b6cce8c8cb3
font_01_sfnt_off0000e946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE946 10064 bytes
SHA-256: 7031fe3cdc0f84f6855f6ffcf6f42646ae7d4920b8d3fed2a0b13e095a0f3ac5
font_02_sfnt_off00010c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C05 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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