Malicious PDF — malware analysis report

Static analysis result for SHA-256 b730d233797c581b…

MALICIOUS

PDF

70.6 KB Created: 2020-12-28 12:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8b55bc6addcf3082de88b7dc19bcd043 SHA-1: 540bccb7962c2aa63bb46cd99e65b9565efcaf8d SHA-256: b730d233797c581b93ba318187bd88f5efd8f5b1900b001f65fa8995e0aa2701
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=general+motors+division+until+2010'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=general+motors+division+until+2010 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/559fc85c-90aa-40b5-a815-89f430358b1a/cochlear_implant_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271f3a44-741c-4263-9efd-ef7bca181a85/county_down_ireland_towns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229ce966-774b-471a-880d-9534ca1e2717/lukinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd99a508-a265-446c-8569-f5ea0195b2bf/vshare_apk_download_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/bichhoo_full_movie_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0eb56e1-6a60-49d5-bfb7-f4a057767bef/82291803094.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/kofemedimeziteb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c42413-d72f-42e7-9954-075db678c13f/athlean_x_arm_workout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbeeeea-4c79-42c0-8991-7a958ec1b9ae/74873643095.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/nobuvetolamikopobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e2eb5f-86eb-4dc4-b3d3-c7703254b2af/23274213792.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/malajapelupoxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA93 5268 bytes
SHA-256: d69132c48c1c94019b124d0b454f1dbb508bc51d472032f76d928ce4047fd9c7
font_01_sfnt_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 10348 bytes
SHA-256: ed320b87d71d6b87509b671dd6d53914fe2fdfbb48fbef723fc7ba620577059f
font_02_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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