Malicious PDF — malware analysis report

Static analysis result for SHA-256 f147e54c44478e20…

MALICIOUS

PDF

75.3 KB Created: 2021-03-29 17:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c64159c7c4c769e8dfeac6093f745471 SHA-1: a9f102c4fc5f9b7930518eef2dfa556812309134 SHA-256: f147e54c44478e2088526d54a7f6387e2266a9b340e9ca4d00a59e8be43304d5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The 'Definition of ready template' text and the numerous outbound links indicate a phishing or malware distribution attempt. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/123?utm_term=definition+of+ready+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448720/normal_600ff784bb411.pdfIn PDF document text
    • https://belogukuke.weebly.com/uploads/1/3/1/6/131637095/a7bf2064217a46.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/7LighiC/giseruxozudita.pdfIn PDF document text
    • https://mugapasuxow.weebly.com/uploads/1/3/1/4/131437627/wosubukaxive_xedewumekudos_vulin.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/Jpepiid/veworo.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/hdhdziD/switch_pro_controller_charging_time.pdfIn PDF document text
    • https://dunopugagikevu.weebly.com/uploads/1/3/4/7/134728147/wupugonuza-semij-nazuva-xolafafed.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/hjt3UEu/29866551167.pdfIn PDF document text
    • http://goldenframecollision.com/burnham_gas_boiler_manualrsn6o.pdfIn PDF document text
    • http://thelandofbadideas.com/kufarizonofajojaravitijuu8pr.pdfIn PDF document text
    • http://sovolox.getenjoyment.net/kozofezakelijejokulisugen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_6024351310aaa.pdfIn PDF document text
    • http://teatr-art.com/111540651821c5zm.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/aem6hjW/java_8._131_offline_installer.pdfIn PDF document text
    • http://vykupavto54.ru/297476143533xk1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405414/normal_5ffb139417ebc.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/hdgchgj/i_peel_good_app_review.pdfIn PDF document text
    • http://golosa-spasibo.ru/hayward_salt_cell_warranty_replacementdohzs.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/sotoselafepemixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fd662e8cd268.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexolofifete.atwebpages.com/85183521942.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/sobirepanis.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_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 5112 bytes
SHA-256: 205f212180af02b5c754336942ecdd91cef76b6527cb9fe0a4d202175952fff8
font_01_sfnt_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 10492 bytes
SHA-256: 8265207ff6d8a8ce47117badef9a47666d40075823c261fefe80bf67a87a9bc8

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