Malicious PDF — malware analysis report

Static analysis result for SHA-256 68533f2795f16a85…

MALICIOUS

PDF

72.7 KB Created: 2021-02-18 05:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3b8d6c1488ed85743d0aaf92172658db SHA-1: fd7cedbee973c171640e7854f4272452bd110e95 SHA-256: 68533f2795f16a85db9cc84275ee261143039a3b12819373e2c9cc67dde42047
126 Risk Score

Malware Insights

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

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 0.9998

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://leonvi.ru/aws?utm_term=ramana+maharshi+ashram+tiruvannamalai+timings PDF link annotation
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/9175152.pdfIn PDF document text
    • http://waystep.site/safenet_luna_hsm_administration_guidexkf7i.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/zukiresujalegijom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_601924e7298cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_60032f435403d.pdfIn PDF document text
    • https://xixasoxi.weebly.com/uploads/1/3/5/3/135324484/tukulezokonopij_lafoxetulomasuk_kalorigalexuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_601dda7842601.pdfIn PDF document text
    • http://aov.one/gazetted_officer_certificate_format_for_name_change33p93.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/cinemagraph_pro_free_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474759/normal_60008572b1d6e.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/raduduzuvuxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5ff7aa37aaf10.pdfIn PDF document text
    • https://baduzasozem.weebly.com/uploads/1/3/1/4/131407439/c25ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pufigopinenise.epizy.com/19971710945.pdfIn PDF document text
    • http://wotikuvejuf.rf.gd/hooray_for_hollywood_sheet_music.pdfIn PDF document text
    • http://jiresigotapikeb.rf.gd/consumer_reports_work_from_home_jobs.pdfIn PDF document text
    • http://bogizun.epizy.com/gaxowemeruvej.pdfIn PDF document text
    • http://bedegexemizi.epizy.com/1572113468.pdfIn PDF document text
    • http://legekiwogitevil.epizy.com/4810780839.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_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 5168 bytes
SHA-256: b2a2c254138184ce91a2e6ae64479321765fb1ee65860594fe6852044d25e347
font_01_sfnt_off0000f02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 10832 bytes
SHA-256: 1d7c54c4633e3cb1a1b13b81855ad923d4f4dbd684af727b582e642108c9c0f5