Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b4b098acc9f8bf…

MALICIOUS

PDF

44.6 KB Created: 2020-09-30 07:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0e75c356de116c8365e62214ffff9237 SHA-1: 6cb46ee8dc5a3e32f168156c61ce3eba81dd20f0 SHA-256: 76b4b098acc9f8bf2ae0995d0801e8c163c4fe644e17d7cbe749bbd3f256b193
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=numbers+in+spanish+1-+1000+pdf In PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/71624753343.pdfIn PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/zamutivasogenifabofutus.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/luvisogolejerodog.pdfIn PDF document text
    • http://files.smokymountaintax.com/uploads/1/3/0/7/130739099/7da8a.pdfIn PDF document text
    • http://dixiz.duniaamir.com/uploads/1/3/1/4/131438019/kavibilazefi.pdfIn PDF document text
    • http://files.colourtherapybylorraine.com/uploads/1/3/0/9/130968988/jamiki.pdfIn PDF document text
    • http://dalivuvi.dragonmarinesystems.org/uploads/1/3/1/8/131857782/suzubu.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/129d31ca-9519-433b-8ade-f714a88291e5/novez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b80bf52-0db1-46c3-acc6-ab4e5a915fa7/11979641487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bcdbb1-b5a6-4b83-a5b2-00ea9d1f65ba/45267135484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5803/5619/files/incredibox_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/porafolonilanise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/somixedabarunemeguxeg.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_off00007012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7012 5584 bytes
SHA-256: ed4fa55b73857058714d02f83d259b770546406f46ae16c24321de70555775ef
font_01_sfnt_off000082ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82ED 10316 bytes
SHA-256: 6bd529c74990978bc45c367b6cd905dcfe265216c2dbd54597e3a40ab84a3b46

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