Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece86ec297ed28c5…

MALICIOUS

PDF

47.4 KB Created: 2020-10-25 16:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: da597e49d271b5f6fb51621684620826 SHA-1: 3b926b5ef5e55ca7dc47aa4e7c4291bc450c0c17 SHA-256: ece86ec297ed28c5f2376243797f2011c885c6458ea7396d29185efc99a2887d
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/123?keyword=ma7165+applied+probability+and+statistics+notes+pdf In PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/0178282ef9a.pdfIn PDF document text
    • https://kaxoleza.weebly.com/uploads/1/3/4/4/134453834/pimuvub_rirelufomega.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/7c86c936a8.pdfIn PDF document text
    • https://jazaxalik.weebly.com/uploads/1/3/4/4/134488577/vivel-sarolukuwaxu-jinobepajisi.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/22554db2.pdfIn PDF document text
    • https://daxozeke.weebly.com/uploads/1/3/4/3/134322415/9cd0a0.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/30b71999ce14.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/1645068d5b.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/6730561.pdfIn PDF document text
    • https://zijovegumasapal.weebly.com/uploads/1/3/4/3/134307166/saxez.pdfIn PDF document text
    • https://likixulojuxe.weebly.com/uploads/1/3/4/3/134386003/wikamajo_mijaf_levazewabof.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000712d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000712d.bin)
    • https://uploads.strikinglycdn.com/files/ed3cfa58-2be0-457e-ba50-005f92105962/xawaluvemolukazojere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503e57fc-15d1-46b5-82e0-c86dbcb53f94/12474913215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2361da1-10c5-4d86-96a5-29ea7a8e3573/1183521970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb9c1cd-33bb-4366-9bc5-04471c6b38e7/35442042294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4c0f9e-a832-4931-8f99-727eb1af84e5/21975902217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7242faf-bf21-497c-888b-c4002d5a0a8e/33133021283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9147dc32-5228-46df-af42-24e773e0b360/17132373494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d39790-0c3a-407e-b868-66953c5f84f6/sexefedozet.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/after_20_years_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/yasin_sharif_gujarati_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/32362763892.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/9408171777.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 extracted file (font_00_sfnt_off0000712d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000712d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712D 5808 bytes
SHA-256: 0c1cb889086c629752f5044a6568c01cb02b487b47408fd69e9a4e6283df5008
font_01_sfnt_off00008513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8513 12388 bytes
SHA-256: 7860446ebb0719519f140d7157ca6c751b18732ec3d781143cc50ad72c0ff293