Malicious PDF — malware analysis report

Static analysis result for SHA-256 1546d47d63f38c43…

MALICIOUS

PDF

74.3 KB Created: 2020-12-24 15:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0678833755d7b9df09d641141f3dcc04 SHA-1: 1d8cb991430a7128e0ed2432d0ae09081a0bb690 SHA-256: 1546d47d63f38c4398c7ae0f78044db074e78a578901bed0e0ee214d84518894
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a link that redirects to a malicious domain, likely a phishing lure. The document body, though heavily obfuscated, suggests a social media theme ('who has viewed my instagram story'). The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into visiting the malicious URL.

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://traffmen.ru/123?utm_term=who+has+viewed+my+instagram+story In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_5f9215c31f506.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/ejharhc/vida_saludable_sep_secundaria_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_5fb6ceb750f7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd66289e60c5.pdfIn PDF document text
    • https://cdn.sqhk.co/xolizoxime/YjdVXwx/free_heroes_2_android.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/gQjahaR/golukodikaretori.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/w4gcide/waraxeratibiro.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
    • https://uploads.strikinglycdn.com/files/5ad5cb21-9f54-49fc-95c3-c26cd8d2bea5/cuisinart_dlc-7_super_pro_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/bonasetoxukiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d7c8d2-4fa7-4e08-9f6c-0cb83ec4e10f/14583027042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9ec887-bd6c-4630-b3a5-2323e221fd63/30807688123.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/jojepizakapajomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be20cfa-d26d-4c97-b2fc-ecbd622009c1/carolina_chaos_aau_basketball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e3e771-5dd5-4914-a7cd-c930c578a61b/wisinunuxir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe02bbd-a3d7-4966-8728-2992904637f5/enrique_iglesias_songs_mp3_download_bailando.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac4229e-8537-432d-a6b7-b6aec6480197/lifetime_fitness_las_vegas_green_valley.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_off0000d68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68B 5264 bytes
SHA-256: 98f81df4468a34d0e55f129da1f390bd020e7c9e0624cbd96df3e74b7634ae8f
font_01_sfnt_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 10684 bytes
SHA-256: 5a2fc19de084f3ae1e83d1dabe91faaca0c9f59f5a969fadcf8e1182e859f016
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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