Malicious PDF — malware analysis report

Static analysis result for SHA-256 770a43d925d29093…

MALICIOUS

PDF

72.0 KB Created: 2021-02-21 13:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6b6f687844e0ade5ab531f636f97a3bc SHA-1: d3e8fc96de3223132332ff7f9ce5d6b2cc07791b SHA-256: 770a43d925d290936f12cc0610ce08d12a0ff7a9fd969db727ad8e330c124fdd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=medical+abbreviations+worksheet+1+answer+key PDF link annotation
    • http://aduo5.online/pisuxewusm2nh9.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/njc9jbx/kugiruporeza.pdfIn PDF document text
    • https://runufegoxow.weebly.com/uploads/1/3/5/3/135347372/8604131.pdfIn PDF document text
    • http://sumekef.22web.org/60433627223.pdfIn PDF document text
    • http://airet.space/64051594071hnif1.pdfIn PDF document text
    • https://wavinibavuma.weebly.com/uploads/1/3/1/3/131398010/fikufaposuj.pdfIn PDF document text
    • http://lightly.store/vesoserinadujalovawpf11j.pdfIn PDF document text
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/b33b9ff2ae37d.pdfIn PDF document text
    • http://zaxanoxejem.iblogger.org/5842336767.pdfIn PDF document text
    • http://xotizel.iblogger.org/english_movies_telegram.pdfIn PDF document text
    • https://gurawibozogudex.weebly.com/uploads/1/3/0/7/130739732/9112386.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/nitatotol/87997453350.pdfIn PDF document text
    • http://pewulalabes.epizy.com/51377656570.pdfIn PDF document text
    • http://pozuzedudakuv.epizy.com/lebizu.pdfIn PDF document text
    • http://renepipelusibav.rf.gd/axis_camera_management_software_manual.pdfIn PDF document text
    • http://nufejubonuviwo.epizy.com/exiled_kingdoms_start_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/sugibibuni.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/61217517528.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 5540 bytes
SHA-256: 65260c871064b14e626dc089c76f7f5acea12f3006c11a0091796e6e5e76355e
font_01_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 10252 bytes
SHA-256: a9a55fcbc497374ac750ac47b702edac3ee2b8e2fa3721c0a0254c116aeee522