Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b9b21e6e8bcdd6…

MALICIOUS

PDF

42.4 KB Created: 2020-11-08 16:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4fe72b566e2c312808be2e76622b9c0c SHA-1: 80688a80c15a958c8cba3b2017fd230e1743c628 SHA-256: a7b9b21e6e8bcdd6c9cadca6cb270d33f9eb9ba4a38a7c35396fda9ee1137521
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://trafftec.ru/aws?keyword=free+online+shooter+games+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f89e8cf31542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5fa2feae03c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f8a65333a422.pdfIn PDF document text
    • https://gujejitemisadud.weebly.com/uploads/1/3/4/3/134354005/caf6cf5c5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d676cb-e4ad-4501-bc6b-b5872031c0ad/lupigusamoxibuwom.pdfIn PDF document text
    • https://puverak.files.wordpress.com/2020/11/65236564333.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/nanowus.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/fesubojedigisovamubaxa.pdfIn PDF document text
    • https://gezovuxa.files.wordpress.com/2020/11/49165319915.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4c87b4-f876-4fd9-8982-ce968b3a344e/70388599235.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_off00006771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6771 5512 bytes
SHA-256: 4418815e87083c86ca0a81f987666d14f3e8c5be21f8366fe07ead90775aaa7b
font_01_sfnt_off00007a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A04 10320 bytes
SHA-256: c3ec427e8f41cf35ec2f71dc9818451b5fe3b2138e7975406d2a9d7895028117

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