Malicious PDF — malware analysis report

Static analysis result for SHA-256 da02f57027ed9253…

MALICIOUS

PDF

81.6 KB Created: 2021-05-29 23:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce819ccb8776d4f931ed016f9b8d269a SHA-1: a8e471a30c562f4f50f40236d4b3f60185b57825 SHA-256: da02f57027ed925327d5bc491bd5a8ac30db99dc87f007859e704293484cc579
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=dr+strangelove+imdb+parents+guide PDF link annotation
    • https://mitiguranam.weebly.com/uploads/1/3/4/4/134456526/lawolowoluf-berexabigo-wowabekag.pdfIn PDF document text
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/famupudebobunep_vudodali_jukig.pdfIn PDF document text
    • https://zavenikalob.weebly.com/uploads/1/3/4/2/134234813/sazigejozub.pdfIn PDF document text
    • https://wisefumi.weebly.com/uploads/1/3/4/6/134672277/5627814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449009/normal_605f6e2bbfca1.pdfIn PDF document text
    • https://gogidexiveje.weebly.com/uploads/1/3/4/7/134762038/3409807.pdfIn PDF document text
    • https://xiwesawubofu.weebly.com/uploads/1/3/4/2/134265581/26d09.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/ginupupusazozow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_604f0d2f129d6.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/gidelisopedexoja.pdfIn PDF document text
    • https://notususapi.weebly.com/uploads/1/3/4/0/134012365/fitodix.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/dc6900b386e8f.pdfIn PDF document text
    • https://morupataniseb.weebly.com/uploads/1/3/4/5/134502176/desosub.pdfIn PDF document text
    • https://nozirokopen.weebly.com/uploads/1/3/4/6/134613575/tawerabewit.pdfIn PDF document text
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/5904166.pdfIn PDF document text
    • https://vapukikavo.weebly.com/uploads/1/3/4/8/134886740/pabusone_gekoporonutokob.pdfIn PDF document text
    • https://piguvedulo.weebly.com/uploads/1/3/4/7/134724556/lawugogedegumefokulo.pdfIn PDF document text
    • https://gepidoduxaw.weebly.com/uploads/1/3/5/3/135324144/4014416.pdfIn PDF document text
    • https://mikofamix.weebly.com/uploads/1/3/4/8/134882663/difinafonupumo.pdfIn PDF document text
    • https://panodetis.weebly.com/uploads/1/3/4/6/134669877/e564eca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_604025bdc1186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_605879e75dae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484605/normal_602ae3084e201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 5480 bytes
SHA-256: f2af5d21959d6a5c8c2a848fc2a8b7eb2c7a05453ea1dc3ac2e7375cb099fcef
font_01_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 11776 bytes
SHA-256: 926c1e22a50278574abd4ff8f64273279e3f51c992cccd8442b12677f850001b

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