Malicious PDF — malware analysis report

Static analysis result for SHA-256 092eaf95379cce81…

MALICIOUS

PDF

46.1 KB Created: 2020-11-02 15:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 0037632cf0720176cb5a3015749a8b35 SHA-1: 83a50c3c77fb1fea2599c5226c37b9d55cb8baa1 SHA-256: 092eaf95379cce81587add6de1c0ec0492d2c652c57b9f7c978a4268ad4d94c2
194 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.
  • 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.
  • 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://gettraff.ru/aws?keyword=gangstar+4+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_5f9c6810249f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8a2cacdf174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8ae61ed24f3.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/076feb53548717e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f9ec04f4d1a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8bee928321b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5f94f10de9386.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/pupori-tuditab-dexanifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f95098c0111e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_5f95db9ebd7da.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007583.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007583.bin)
    • https://s3.amazonaws.com/xanebavifamopez/jetaxofinepemekotisekexu.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/voltage_and_current_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/archimate_3._0_specification_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/memento_mori_short_story.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/modelos_pedagogicos_caracteristicas.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_off00007583.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7583 5076 bytes
SHA-256: 214c44a96eed14851da44d519bf9410ca994429f220172a36dfe148a81ed81cb
font_01_sfnt_off000086e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E4 10868 bytes
SHA-256: e3c79c71d66aa1f4fa7ddc4fcf2e174ac6f73328a76df5cf42e645315506d102