Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afec8cb645e0fea…

MALICIOUS

PDF

83.1 KB Created: 2021-02-12 15:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b0687dd1484dc66e090e8c520962a7fe SHA-1: d2a57130d5b398df291955f7c42d4863849754f7 SHA-256: 2afec8cb645e0fea4c93feebfdb542ea319b9d86fa49e62e514235d95c6ebe14
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO spam and phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically points to a redirector designed for free-download phishing. The primary malicious URL identified is https://druttle.ru/wix?keyword=alex+rider+skeleton+key+pdf, which is likely used to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=alex+rider+skeleton+key+pdf PDF link annotation
    • http://wegoduxevuda.iblogger.org/30616373658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369512/normal_5ff6924ec5ace.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/baxasanesukebo_kosod_pevoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5fff695c9a48b.pdfIn PDF document text
    • http://mosaniz.22web.org/zelis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_5fd650d180385.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gokobuvutojo.epizy.com/jevunaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/very_sad_punjabi_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/kapawofedodami.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/brynmawr_school_uniform.pdfIn PDF document text
    • http://jaxovisujopav.rf.gd/ninefokorugu.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/informer_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/nifeluzasalukalut.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/49409053746.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/89162130559.pdfIn PDF document text
    • http://gituloropo.rf.gd/medical_report_sample_in_ghana.pdfIn PDF document text
    • http://budunasetixap.epizy.com/i_m_going_up_yonder_sheet_music.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/pathfinder_incorporeal_template.pdfIn PDF document text
    • http://zipokuxabatu.rf.gd/common_interview_questions_and_answers_for_secretary.pdfIn PDF document text
    • http://nigukeja.epizy.com/guidestar_nonprofit_report.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_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 5048 bytes
SHA-256: 423892dc623ceb12e4f766dd79ecf4c746b03829e34bd4997154e113c488ebf6
font_01_sfnt_off00011cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC6 10000 bytes
SHA-256: b63e333dd5c3ea059ff054df9bac3c6eb40fd5bb071c26f7be15af607ad6ad39

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