Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6fb7f33a31960f…

MALICIOUS

PDF

46.9 KB Created: 2020-10-01 16:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 7422bab52dae8621aa024b899006a4bd SHA-1: 8f52ce1032473c0fe0b4eff8868aa0691c963028 SHA-256: ad6fb7f33a31960f80d73b7424577d5906b1ca706255a9572115d00b88887abb
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=online+pdf+text+editor+free+without+watermark In PDF document text
    • http://files.drkimberlycharper.com/uploads/1/3/1/3/131379343/javiz_wowevavopapu.pdfIn PDF document text
    • http://rediripus.everbrookefarms.com/uploads/1/3/1/4/131406925/jixati-ritubaz-maruwejakopiwer-gadenika.pdfIn PDF document text
    • http://files.alwaysmoreleadsaruba.com/uploads/1/3/0/8/130814900/vinuvilakunufukozi.pdfIn PDF document text
    • http://files.snowangelsiberians.com/uploads/1/3/1/3/131379724/zejamo.pdfIn PDF document text
    • http://bovofev.nbblackhistorysociety.org/uploads/1/3/1/3/131383839/xufipu_jowufagodedot_numod_xatunalotudimet.pdfIn PDF document text
    • http://files.ibuysfv.com/uploads/1/3/1/3/131380564/godabasamobuxagasu.pdfIn PDF document text
    • http://files.wafflehousecatering.com/uploads/1/3/0/9/130969772/fcb18a9d38.pdfIn PDF document text
    • http://files.givetoothers.org/uploads/1/3/1/4/131406403/besulure-fedabipajul-zatupafowag-waguvorutebaw.pdfIn PDF document text
    • http://files.dalesbus.org/uploads/1/3/1/3/131379356/gebenojemonolatad.pdfIn PDF document text
    • https://site-1036981.mozfiles.com/files/1036981/52555613059.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/45347006289.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/xeris.pdfIn PDF document text
    • https://site-1038322.mozfiles.com/files/1038322/29466376798.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/ab9d7584-86ef-410f-9c12-41dc7e559b35/12831169516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cd9ec4-1308-4b81-b462-832fb4bd23f4/lojezibanizakemix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf84d9f-ac43-4a97-9a2d-e748c36cb49a/fomugudukasinesitateleb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d13f831-7902-4aa4-a0b3-ea37e05c11e5/57353881046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1839ec60-d6fd-47db-a2b2-6b2326a4dc78/56411875401.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_off0000787f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787F 5352 bytes
SHA-256: c04373aef1fba2129a8f9340c2a61f691216b16f1186922fa92346b67ac7a2f4
font_01_sfnt_off00008aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA2 10352 bytes
SHA-256: aa6588837038a90991b1d0ccdf308a2164759d8e7c35e80bfdc3b7d1c3516523

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