Malicious PDF — malware analysis report

Static analysis result for SHA-256 863a123c74ad47fa…

MALICIOUS

PDF

85.9 KB Created: 2020-11-17 05:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b930c2fe9e75edf28ae2b2810a4dc83d SHA-1: c8fa4c58e28439af18f36e9a471bc4c2145d79d0 SHA-256: 863a123c74ad47fa935b3d89bd45e6ece0d28ef6b530456949ccd6f239bd1cde
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector, specifically designed for phishing lures related to free downloads. The primary malicious URL, 'https://traffmen.ru/123?utm_term=super+mario+sunshine+dolphin+android', is identified as a redirector. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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://traffmen.ru/123?utm_term=super+mario+sunshine+dolphin+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f89aa7f0f7d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f9549519b521.pdfIn 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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/subud/vikerunolizibizu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/dolphin_triton_ps_plus_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127e2057-88ce-4624-9578-0a0635538ce5/watch_movie_mulan_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ea4c17-8bf1-4324-9f40-dd557b9cc6c2/fexuzaxidebuvokevolufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/436515f0-7d41-4abc-87a0-e06a87a50f4a/kemirizazusix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a885f9-a677-4aa8-9ffb-0726b0afc340/52044284895.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/berea_elementary_school_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0787a727-5556-458d-bd90-4fa175484e24/discord_server_name_ideas.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 5104 bytes
SHA-256: 42e2ac7fca7fa4ab5b9972687a2a4a4d21ec9ef92e8d258edefabffaee40e9ac
font_01_sfnt_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 11852 bytes
SHA-256: 5d9111b5a8bb6f1bd0119cbc3fcac48cba27fec9e7258124b55038f7e90c1543
font_02_sfnt_off000131c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_03_sfnt_off00013fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC0 2504 bytes
SHA-256: 601d5542c8bb3980058234466c43434967e5a15d97c49f6390c5bd460e15aea9

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