Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5752614a3f64f7e…

MALICIOUS

PDF

41.3 KB Created: 2020-10-07 17:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 53961bfd93b20e2acd2a4840fc8a67fd SHA-1: e3ce577d47a5b941861b9bfdad0b9c242e599045 SHA-256: c5752614a3f64f7eb2103825d41393fdad8dafeef0be24e89ef17c07939bb675
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://cctraff.ru/pify?keyword=rainforest+cafe+coconut+shrimp+nutrition In PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/15271624117.pdfIn PDF document text
    • https://site-1038629.mozfiles.com/files/1038629/jutegibuwapuzaba.pdfIn PDF document text
    • https://site-1036867.mozfiles.com/files/1036867/xozipisulibodegisenulad.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/30344451342.pdfIn PDF document text
    • http://files.splashnaturals.com/uploads/1/3/0/7/130740524/memigifefak_sijesapi.pdfIn PDF document text
    • http://bawibot.mundeleincommunityconnection.org/uploads/1/3/1/3/131380600/zuvasif-javeki-zujosedovifola-jijedezewe.pdfIn PDF document text
    • http://tapaw.our-topia.com/uploads/1/3/2/6/132695424/dupagerelenew.pdfIn PDF document text
    • http://kisevew.savannahwallett.com/uploads/1/3/1/4/131407995/miwigabakul_kijogovo_watijitinex.pdfIn PDF document text
    • http://files.defineandfree.com/uploads/1/3/1/3/131379110/7745090.pdfIn PDF document text
    • http://mojibivo.magia-metachemica.net/uploads/1/3/0/7/130740151/0abfd64a1e7.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/79f6e21c-4270-430d-975f-b103e2dad2c7/wemisekemevozitijuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3879fe36-a9ec-45ea-94eb-deb037a446b0/lomevabubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64ebb59-b851-4935-a4a8-942e5d857b72/42443704397.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_off0000604c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 5232 bytes
SHA-256: b207eb7e261486dfb2eea6083677774477ed6693450a64dd5e556dbb51a1bf6a
font_01_sfnt_off000071fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71FD 11344 bytes
SHA-256: 573440a00184b073037cc2311664088e867a9b007c33836282f355f15e33a965