Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68d9a5a43c48969…

MALICIOUS

PDF

74.6 KB Created: 2021-03-25 22:25:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 711db031149e9ad6118306b57190e101 SHA-1: b5482b53c7743afd1610d75b8ca13bc5d9452f0d SHA-256: c68d9a5a43c48969e66b56e72fe987b92b0bc535e880cae4a0b34e0e0dea1190
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to 'national cash register repair manual'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious link farm designed to host phishing or malware distribution pages.

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://gimoguvi.ru/wix?keyword=national+cash+register+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456676/normal_604b2d3b99ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5fea46d7ede41.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/gufegi.pdfIn PDF document text
    • http://xulenegutuwovi.iblogger.org/68602420427.pdfIn PDF document text
    • https://zulunapakaf.weebly.com/uploads/1/3/1/0/131070820/davujasopapole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_600c6e70219ef.pdfIn PDF document text
    • https://sikezenubotimer.weebly.com/uploads/1/3/0/7/130739875/6885859.pdfIn PDF document text
    • http://taxafig.66ghz.com/3349001451.pdfIn PDF document text
    • http://zulamulowegus.iblogger.org/73615065547.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/kewakuko/hdfc_personal_loan_track_report.pdfIn PDF document text
    • http://poxelisenaxoxig.epizy.com/papetodipumelubalijo.pdfIn PDF document text
    • http://sajurewe.rf.gd/pukuvefurixapija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3fe94c-76f6-4479-85e1-c45950b54485/kirby_vacuum_repair_mesa_az.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1694718-09df-4ef3-bf9a-5e2772058836/40545901818.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/dynamics_365_licensing_guide_2019.pdfIn PDF document text
    • http://kujafugakare.epizy.com/guitar_sheet_music_generator.pdfIn PDF document text
    • http://puvujisedine.rf.gd/cutting_edge_pre_intermediate_resource_bank.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/42192844433.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 5316 bytes
SHA-256: 2e495bb9921798b0a94c62394f88f9fbe750dee27666410cadcec257d4ff6ba9
font_01_sfnt_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 10080 bytes
SHA-256: 48236301740fd78043c41016911694e4f17e8186cc7b71b28332609156dac5e8

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