Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66040dc84c1592f…

MALICIOUS

PDF

84.2 KB Created: 2021-03-29 00:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4870015c2257ecb3b69dcfa56948e983 SHA-1: 5034e8d9276dc4b87ce3b0f38e8122a99752e021 SHA-256: a66040dc84c1592ffa6ba9c7264bbd7318e00bf10d84901df3d980299af242d2
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/aws?utm_term=browning+a5+ultimate+26+inch+barrel
    • http://prizinsta.site/fukigiwasemukakabotaqbunx.pdf
    • http://lapafuros.22web.org/63074796482.pdf
    • http://goodsun.space/minn_kota_trolling_motor_battery_power_center_blackxg5ne.pdf
    • http://begetus11ppz.xyz/jilupopibiluxibajopemhfmuv.pdf
    • http://modebedunizux.iblogger.org/canada_visitor_visa_application_form_egypt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lovomijelun/xapalifolufometopukatij.pdf
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_c8d34c1333ff49bb941f747710a3999b.pdf?index=true
    • https://s3.amazonaws.com/kesumasaka/vanaw.pdf
    • http://kovemipenege.rf.gd/98966449566.pdf
    • http://fijinibegomiba.rf.gd/73558217557.pdf
    • http://papipafikumi.epizy.com/tumumotibeb.pdf
    • http://nesemenofete.epizy.com/java_apache_poi_html_to.pdf
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_e20486a1bb4b45bda777f8ee0798c9cc.pdf?index=true
    • http://wuwerodewepejij.epizy.com/82209471582.pdf
    • http://dulubuli.rf.gd/85175947717.pdf
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_bbcc79bda7ac4a2ebba7f576ab71e490.pdf?index=true
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_b73a1f80d062444ead8c5f09b9036c69.pdf?index=true
    • https://s3.amazonaws.com/zupenafud/jefigopewosegirelamiw.pdf
    • http://tepimajasajuk.epizy.com/tboi_revelations_chapter_2.pdf
    • http://giratas.epizy.com/42710318925.pdf
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_53ed0e6cdb2a4df9be2d08cbfefa9701.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001054b.bin
55e794fb66a4e43f6f64571959c857f673c8f7ecd23eff42647ccbfa0d0781b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 5728 bytes
font_01_sfnt_off000118bf.bin
18c41d8e61905769bd12bec52b290c356ba999d4c4581d266828da519c5c97dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118BF 12824 bytes

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