Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8be91adcf79a22…

MALICIOUS

PDF

68.5 KB Created: 2021-02-21 19:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b9e5a3f2cb26b2a844acb95e941cd381 SHA-1: beb0eea530e3d44631f2de0fcdf93084e2507d27 SHA-256: 1f8be91adcf79a22d3cdd992d955fd1e5678e1641cea51653c84cdfd62c0fc9b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/123?utm_term=common+english+study+bible+large+print In PDF document text
    • https://cdn.sqhk.co/merabuvi/hPIghKv/mega_mall_story_2_apk.pdfIn PDF document text
    • http://itawegan.space/bascom_avr_projectspyxmo.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/tapuxibopukigojutoresfre72.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/GgfKpii/banana_runtz_jars.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fe52dfa61116.pdfIn PDF document text
    • http://prazdnikprosto.ru/vidigopuxodakil4u7c.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/1yTHnih/tumblr_drawings_love_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/ggrmheq/39135141610.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/jghRoig/make_a_cake_cooking_games_online_play.pdfIn PDF document text
    • http://rentline.pro/besilekaqin3d.pdfIn PDF document text
    • http://magicwoolshop.com/kodiak_bear_hunt_cost1mndo.pdfIn PDF document text
    • http://zavodtriumf.com/number_theory_notesr9159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_601d369e5ab46.pdfIn PDF document text
    • http://power-guard.shop/wemefuruxejibozimi6kqrx.pdfIn PDF document text
    • http://kihepc.xyz/wazarafegvqxhy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ceb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB7 5520 bytes
SHA-256: 02682b344c7b7a5a8cda57dc3cd6befaa4f74a8e6aaec4942b3d4aaeefc25097
font_01_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 10552 bytes
SHA-256: 080d6f178f925d4d055799dddfd4b513a87f29873cc3de30cd435c3267f0a119