Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d61947ec5fa055…

MALICIOUS

PDF

69.3 KB Created: 2020-12-28 20:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0338eeccd0a3c1aef24b89edda1b7ced SHA-1: dadc7069c2250d6e50d80524d3fddeeec1dfc5db SHA-256: 83d61947ec5fa0558adaf855c9127d01499ed08b7c50acedfec71eb034c49aab
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/aws?utm_term=capsim+global+dna+guide'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. 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 0.9998

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/aws?utm_term=capsim+global+dna+guide In PDF document text
    • https://cdn.sqhk.co/tigufarejeti/0ghMwjh/tangled_2021_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5fa0ed08b1013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448713/normal_5fe41dbf88770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421764/normal_5f9c89972da85.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/eggghha/funny_sounds_dogs_make.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5fcf7f9b9d927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e2df3b-8263-446e-ac03-4c0cba57b0c1/lijifobive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5044e19-eea3-4086-a348-dcea98b49888/nguyen_ngoc_ngan_wife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a27178f-48cf-4f05-bbd2-727a25df3d66/msdf_inmate_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c627878b-4bbe-4d1d-9a99-251e45f64bb0/north_face_market_share_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41808f79-cd68-470b-9917-8bb4a7b437f1/94910101653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064fde50-3af6-489f-a6c1-99189e44aec7/master_replica_lightsaber_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67be3d75-3d16-49df-8e33-97ffa69d599f/guposutulifowova.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_off0000d1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A0 5228 bytes
SHA-256: 8db30add2007ffcb335e5011133c54fc6ef34531a4303cfe406372b2405af4eb
font_01_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 10960 bytes
SHA-256: cd3aaa66b2568bef0f5f4931f056d3035a3a476856a37b0c32bd3a3e037bbab0

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