Malicious PDF — malware analysis report

Static analysis result for SHA-256 c993978a2fe8143c…

MALICIOUS

PDF

44.0 KB Created: 2020-11-06 20:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 8ca8be7e36bd9872c5e27cc9e0fb35f9 SHA-1: 5767d1e57d1ac07ac1cc7ead52c466734184d0ee SHA-256: c993978a2fe8143c69e7f5b605dbf3042a8812f75c21eeb5557ae0bb79b41714
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=ray+diagram+practice+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5fa0ef61a0501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f967082eabb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f90608e5854c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428038/normal_5f9859f2e4912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8e2478410e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a7e7c62c-0be2-4588-8c87-5589d30ffd70/guxelapuniwajedov.pdfIn PDF document text
    • https://sazajade.files.wordpress.com/2020/11/fefofapexadomak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c929596c-30fa-41f3-93fb-4544f636ef7f/artificial_academy_2_character_creation_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/komidudulitonoxowo.pdfIn PDF document text
    • https://lavukiju.files.wordpress.com/2020/11/kesozexinajemikidip.pdfIn PDF document text
    • https://daxazepuj.files.wordpress.com/2020/11/70991830614.pdfIn PDF document text
    • https://gixilegewe.files.wordpress.com/2020/11/mepanopozepuwamibakub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3d337a-d552-4083-952c-99813b0f045f/28592579153.pdfIn PDF document text
    • https://xixijositif.files.wordpress.com/2020/11/nisogitidelurapilalore.pdfIn PDF document text
    • https://tirokitita.files.wordpress.com/2020/11/3245322306.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5356 3012 bytes
SHA-256: 9f4b9a9fcd4a7fd0527f4694b63b992009dd0bd78dc606659ad1eebee4df53ff
font_01_sfnt_off00005e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1D 5136 bytes
SHA-256: fd480ef8bf793e428d9f66f9b9e5225c374127bbe0cc3f49b8ff962acf928d12
font_02_sfnt_off00006f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9D 11812 bytes
SHA-256: 7d0755fe66467e9c7d3b3173c6ef14c85e3c6d3d7ce9fc5ebfdb190d10523c9d
font_03_sfnt_off000094a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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