Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17ffabcd5740dbc…

MALICIOUS

PDF

67.2 KB Created: 2021-02-23 01:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 843bca6805e9b5f787eddb375f8bd8d3 SHA-1: fc8e8075a37b3ff76058b5d2703168fe60348634 SHA-256: a17ffabcd5740dbc85caf90b979b8bf080082508cb18f7753260af03ef6ceecd
196 Risk Score

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=descargar+libro+el+guerrero+de+la+luz+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497344/normal_5fc98c10e091e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5fe6942facaba.pdfIn PDF document text
    • http://zowefokixot.iblogger.org/bow_tie_cinemas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_5fe7d6e77b6a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_5fd9a5ac60850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fd5fb2e8eb99.pdfIn PDF document text
    • http://dalurekawo.iblogger.org/bacula_windows_server.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/bosezilatexulasofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5fd0ea5189c79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rasunafosav.epizy.com/isomerism_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/process_description_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/vosazuwisavetaxixosuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/gebigulidediwutekiwesuzef.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/zunupisodivi.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/46188251304.pdfIn PDF document text
    • http://nixikoko.epizy.com/17173550413.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/23260722442.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/autodesk_revit_2016_mep_fundamentals.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/71920967402.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_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 5512 bytes
SHA-256: 25954043eb4011ce2df66075200e89903bf13fc7af9266a6f421dab04c493a9a
font_01_sfnt_off0000da43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 11044 bytes
SHA-256: 7427a9f64e3104fe27d27a938da5d16f004c5e9dc5335f5a069c4047d3a8cd24