Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cdf65411b85fdc…

MALICIOUS

PDF

79.8 KB Created: 2021-05-02 16:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eb58a60213011712196372cb1acceccd SHA-1: 0af18973e40dd6a753185710122314969aed8360 SHA-256: 59cdf65411b85fdc2246c08d23bbc5bd9208cf6873187d8c0eb9ee366a9d08f3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including a link farm on disposable hosting, suggesting it is used to redirect users to malicious websites. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=will+a+man+test+you PDF link annotation
    • http://jafebidit.getenjoyment.net/42811575929.pdfIn PDF document text
    • http://gasolotiravizid.sportsontheweb.net/lugorudagomabiralilubul.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/sezidotoras.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486758/normal_5fcc4fada9274.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/wuvoxexelisejexipebiru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5fe0282916631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_604d7d39e1e72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443594/normal_601dab64df4fb.pdfIn PDF document text
    • http://goxamid.mypressonline.com/dnd_5e_fighter_main_stats.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/40_rules_of_love_rumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393190/normal_5ff0dcb2e6091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_601df79683e4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb69dfa6fe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_6069e1237e272.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
    • https://uploads.strikinglycdn.com/files/1266595a-648d-4073-b1a2-d92db1f3a621/sotuvupuzotamubazof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04830a3-61c5-463f-af58-26999c755cca/xawoxepulep.pdfIn PDF document text
    • http://kemesid.onlinewebshop.net/estudio_descriptivo_sampieri.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/mekapele.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/2670495819.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5D 4732 bytes
SHA-256: abbfcb2db43a59125936e6e98e0bcc5f994f6fceb6bb18d1ccfa1ea840430efe
font_01_sfnt_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 11160 bytes
SHA-256: 3dfbf5732701beeca5b13abbb9699da020ef60540bf59ccd0d3fc9eaefe420c5
font_02_sfnt_off0001226f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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