Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e11f5ffbfd08bf…

MALICIOUS

PDF

54.3 KB Created: 2020-11-07 03:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7fad41ed17ff37832bad2c35cb050ae9 SHA-1: 8aa0ec61de86251594d13b0b6655ec4d25bff8bd SHA-256: 19e11f5ffbfd08bf128fca61911426f975c8dacba3d97d01f4f4dd89308c1905
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=caribbean+culture+usa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f9602db7089a.pdfIn PDF document text
    • https://nunogekir.weebly.com/uploads/1/3/4/5/134597520/6748673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f86fe8792ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f905929e3043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://panezij.files.wordpress.com/2020/11/modern_tkinter_for_busy_python_developers.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/nozotimujadixixutilu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/public_administration_syllabus_for_bpsc.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/kuxuri.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/st_mary_catholic_school_walnut_creek_ca.pdfIn PDF document text
    • https://sigonofov.files.wordpress.com/2020/11/69463366817.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_off00009610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9610 4836 bytes
SHA-256: 841b7479260401ae32ee641f923e6bdbfe7d20fbfc14f3fcd9b8051a487480e3
font_01_sfnt_off0000a688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA688 11808 bytes
SHA-256: 6027b2786fc70dba0280800e7e0489663f60565e514342707610f40949c45644

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