Malicious PDF — malware analysis report

Static analysis result for SHA-256 e252effbc59ecb5a…

MALICIOUS

PDF

55.8 KB Created: 2020-11-08 20:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 5a75d27fb094e9884a7c3958c708400a SHA-1: 94bb711f869cf48079f8b8d3292b1f13876a45db SHA-256: e252effbc59ecb5a39f590ac464588b473731ed7813c14902dd747f819ed5f38
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?keyword=emperor+clock+company+fairhope+alabama PDF link annotation
    • https://mukokoloraji.weebly.com/uploads/1/3/4/1/134131612/8843713.pdfIn PDF document text
    • https://gitojigobireko.weebly.com/uploads/1/3/4/5/134517815/c32e9aa541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f9c479116ee3.pdfIn PDF document text
    • https://gelekale.weebly.com/uploads/1/3/4/2/134266195/rupebalamapagesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fovodifikade.files.wordpress.com/2020/11/henrys_law_constant_for_co2_in_water_at_25_degrees_c.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/69056655281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc46b3b-d034-4bd5-9d94-34716a2cac35/fuwofilosa.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/56246255322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcae040-a7f7-4cdb-9742-0c7989797d4b/luwog.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_off000099a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A1 5340 bytes
SHA-256: 9f511aec0df3c9afa060fa89f16939b32800cc578bd45d862cf84dba2590d5a0
font_01_sfnt_off0000abb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB0 11432 bytes
SHA-256: 3a1cb57e7edf792efccfb02e0fbedecdfabd7b12fb01752f51dacefbbef0db1f

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