Malicious PDF — malware analysis report

Static analysis result for SHA-256 444251491015be70…

MALICIOUS

PDF

42.2 KB Created: 2020-10-03 15:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b127984f520efcfd4dd929bd55b860e1 SHA-1: f34a9ce1421634eb9c4c3e31343bbbdd6b90d72e SHA-256: 444251491015be706e1755e34b1e07fdfab879ba134d7e8440ef2116b87e2fdf
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/strik?keyword=let+it+be+beatles+mp3+free+download+skull In PDF document text
    • http://files.gumbogiftsandgallery.com/uploads/1/3/0/7/130738722/zalopupa.pdfIn PDF document text
    • http://files.gioialleria.com/uploads/1/3/0/8/130814100/3575365.pdfIn PDF document text
    • http://verali.ufloriaorganics.com/uploads/1/3/1/0/131070450/dinoz-redijurokopasot-zisisigeso-xotaguka.pdfIn PDF document text
    • http://gufod.caribehotel.com/uploads/1/3/0/7/130739024/8345798.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/19555915587.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/vezakulubuwaxuwosir.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/3fac4798-47fc-4beb-9d2a-9e3a1a7520be/50342273840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db63f04-3c30-46a4-ac6c-03e2290d1dc5/badiwitusifiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6db75c0-2752-488a-9579-804af263914d/78917127421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3305/9479/files/kasizexojulevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/car_x_drift_racing_apk_mod.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_off00004f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F71 5468 bytes
SHA-256: 8abf0e81f9f169d58e4ff4a773cae105826007aa4e3524c1f51e3b40ab8ed509
font_01_sfnt_off000061fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 14220 bytes
SHA-256: a904fca58196cb0dc5f64af0a50aaae41d6cc578dd12758ac5a1d93ee1f0060c
font_02_sfnt_off00008de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f