Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1e71ef7c3f4f86…

MALICIOUS

PDF

72.9 KB Created: 2021-02-18 01:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9e81c67fe87dacd9e86d9533b23fbbea SHA-1: 4f23ca3fca2c5b0de0e3b8217113e8035ed61d0e SHA-256: 3a1e71ef7c3f4f86602dc45ff2bfce825c41f2f692569c7c314b3d4918100de7
136 Risk Score

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
  • 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://jacksth.ru/wix?keyword=postdoc+cover+letter+latex+template PDF link annotation
    • http://shoop-fp.ru/gibirelosupgyf6q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420449/normal_5fe43306d66cd.pdfIn PDF document text
    • http://upgrade4me.com/8631364658114ut3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374372/normal_600493ded75ea.pdfIn PDF document text
    • http://arthromedro.xyz/jarogoxaduritirezenakibimtan19.pdfIn PDF document text
    • http://o-karte-kopilka.com/lipumalozogigowoxuli44d1.pdfIn PDF document text
    • http://nalobuberejiner.iblogger.org/gibiravexibinanofigumo.pdfIn PDF document text
    • http://sodahq.pro/54265669503oabkh.pdfIn PDF document text
    • http://sanezukevuzav.iblogger.org/10069641699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_5fd33d26a376d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471996/normal_5ff4d1246c391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/jotter_monitoring_template.pdfIn PDF document text
    • http://lofekelatek.epizy.com/lodoxotitofukojoli.pdfIn PDF document text
    • http://runijagaf.rf.gd/captain_tsubasa_dream_team_skill_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/car_accident_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/balance_sheet_of_a_company_example.pdfIn PDF document text
    • http://wepaxilex.epizy.com/61393124877.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/vujituk.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_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 5348 bytes
SHA-256: 4806eb618706a883dc5bbbb210c152254219b54663de6d6e16d80c900c50ef8d
font_01_sfnt_off0000f4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 10008 bytes
SHA-256: 2e95577dba6cc966506eca68ef19cf87ba0e531bb0d58f2cdc6aef3da90ae6a9