Malicious PDF — malware analysis report

Static analysis result for SHA-256 052eac888088531c…

MALICIOUS

PDF

78.7 KB Created: 2021-03-27 15:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c97c13369829c71a9d686184f2246a5d SHA-1: 52d2c9d8cf7aab0011734244d065782bbb2c085d SHA-256: 052eac888088531c9db8fa3a8c543dd244195dd19f51c56d1ee060d54bced7b0
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains multiple external URIs, including one that appears to be a redirector with UTM parameters, and a heuristic indicates it's a link farm on disposable hosting. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly suggests the document's purpose is to trick users into believing they need to decrypt an archive, a common tactic to bypass security gateways. No scripts were extracted, but the PDF structure and heuristics point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://fokemale.ru/strik?utm_term=how+to+reset+homepod+to+factory+settings PDF link annotation
    • https://cdn.sqhk.co/megopofe/wthfhb6/rafilixulowijezikaferufob.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/ezgg3id/jadedomujudusadepawurukap.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/TWghibl/kukakemosol.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/illinois_prevailing_wage_rates_2018.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/62379129828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450501/normal_5fff520a15ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_6014cef4900c3.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/begetukizosipufiji.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/iicugBI/kositijusorekiliv.pdfIn PDF document text
    • https://cdn.sqhk.co/sedefoken/jiI5geS/scheduled_caste_certificate_form_delhi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xosofidevutora.epizy.com/beverage_company_business_plan.pdfIn PDF document text
    • http://givoraxanusupe.rf.gd/gotunoponilinizegikezu.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/windows_10_home_iso_image.pdfIn PDF document text
    • http://titugol.atwebpages.com/kirby_sentria_parts_list.pdfIn PDF document text
    • http://vidavimutisov.epizy.com/aristotle_nicomachean_ethics_book_7.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/noxalupefekekiva.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/bipolar_1_disorder_dsm_5.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 5480 bytes
SHA-256: 1c61b67da7a060b8930c4557e44e5fe55f01e7309f405c58863bc6dbd08e7ebc
font_01_sfnt_off0000fd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0D 10136 bytes
SHA-256: 71ce00670fd2e7ee7adce5d3bbe5d3746f50ca085b78153a87f3da6914afff3e
font_02_sfnt_off00011fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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