Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bac0e24e66e6f9…

MALICIOUS

PDF

41.2 KB Created: 2020-11-08 16:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e8f1e9216486b3b4eb9e48b7b954fec9 SHA-1: d711325a5eee707981c36c0d9d56cc51b5c51942 SHA-256: e4bac0e24e66e6f9152c2c196a5eb8bba2c2fca4607d366731659659570a3d1c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdf.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=proterozoic+eon+facts PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/440e9b52fb1.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/worelibisedelog.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/9905354.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9578e95-0084-494f-b10d-9ce407686dbf/49609215100.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/69798709408.pdfIn PDF document text
    • https://soreber.files.wordpress.com/2020/11/sinhala_english_translator.pdfIn PDF document text
    • https://xukepuf.files.wordpress.com/2020/11/la_mariposita_est_en_la_cocina.pdfIn PDF document text
    • https://xubewinuvi.files.wordpress.com/2020/11/jasuwobofijukalitimiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/70363183336.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/movie_25_apk.pdfIn PDF document text
    • https://denenuso.files.wordpress.com/2020/11/rokinovexelapuk.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_off0000646d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646D 4896 bytes
SHA-256: 94c8e9dfe68c63f02517cff87cb3a2b8f45bf6ad133eb520ddc349ce2cd75acb
font_01_sfnt_off0000752c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752C 10344 bytes
SHA-256: 527b3bcfc7e86627e1bfd1adef356a0bfba1ddbb243342ede2b1410d5fc1a76f