Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad4cc79d52d819b…

MALICIOUS

PDF

72.1 KB Created: 2021-02-15 04:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9cd0ddd281360fc8c51f99a8038a6677 SHA-1: 6329520080aa5a329d3329a8fb2b069d87fae733 SHA-256: dad4cc79d52d819b763ecd2ae7f81bd0b497bfe3762ce29ad3e7e8c1266a13cd
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=watch+the+princess+bride+online+free+megavideo In PDF document text
    • http://bigtittybella.com/cual_es_la_estructura_cristalina_deab327.pdfIn PDF document text
    • http://sexesex.site/tableau_lod_calculations_performance9u7ez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479710/normal_5ff5c95319471.pdfIn PDF document text
    • http://draiwenstore.online/auto_reply_email_outlook_2010cvax4.pdfIn PDF document text
    • http://nanutoz.22web.org/xudibebimefazuzemupefigis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5fec9377354f1.pdfIn PDF document text
    • https://sovevalejuwup.weebly.com/uploads/1/3/1/8/131858043/gafanipi.pdfIn PDF document text
    • http://stebsmeh.space/79649367573bfyyy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojokedasu.rf.gd/army_apft_scorecard.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/64047475700.pdfIn PDF document text
    • http://dawegad.rf.gd/8th_grade_staar_math_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/fefewofenepuw.pdfIn PDF document text
    • http://dobupefibukin.epizy.com/69188406293.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/47355440998.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/ga_guidestones_commandments.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_off0000da2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 5780 bytes
SHA-256: 03cecbc6f78acea49995d9b16b160b1a75d98c483f8832ff9121e10b0e8ad9d5
font_01_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 10916 bytes
SHA-256: 6b7460eecbccf15c31a2594aaa11f71d6699ec4e22c68abc9e05f52d0bec79d5