Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1f71af709018a1…

MALICIOUS

PDF

71.9 KB Created: 2021-02-28 21:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 343570f0ac4f441a7ba2bbbb5ed88341 SHA-1: 302d1737efb0c7033eb184e314bb1ad99af15f31 SHA-256: 6b1f71af709018a1af20b5f31ec8d9220edad0a7d904bfb72dec0e51e7f4b6e0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=stellaris+war+goals+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425507/normal_5fd84c9d1c6c7.pdfIn PDF document text
    • http://weraka.online/types_of_determiners_worksheetsjlswv.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/audio_technica_lp120_needle_replacementgyu47.pdfIn PDF document text
    • http://ig-copyrightviolation.com/52440623506p8kd6.pdfIn PDF document text
    • http://tixshopclub.space/dna_extraction_from_onion_lab_answerssdkby.pdfIn PDF document text
    • http://instacopyrightcenter.com/arithmetico_geometric_progressionj28wl.pdfIn PDF document text
    • http://itravelgr.com/rancilio_silvia_clean_solenoid_valve8nyfy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_600e8a3d02fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_603032183dc97.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/zubuwujoxom/rofufusujan.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/hillsdale_lake_ks_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/45491131237.pdfIn PDF document text
    • http://lirufuti.epizy.com/short_a_vowel_sounds_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/varezabokijuromiruxububun.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/combine_multiple_worksheets_in_excel_2010.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_off0000df21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF21 5340 bytes
SHA-256: 0ff3f3f19e2e9726811d8bec4a9b645e60ffea90558e2d72bc8c81821b8036cf
font_01_sfnt_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 9936 bytes
SHA-256: 2b492f05b4167e0f60920b6b4200203907d69524cab10a0c5862a0b634b72446