Malicious PDF — malware analysis report

Static analysis result for SHA-256 c992ed351421b70a…

MALICIOUS

PDF

43.2 KB Created: 2020-11-08 13:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6b14b45ba15a53d9a1ff9e612fd1d6fc SHA-1: 588e8bf339ec6c1aa0bc1b4f58ad6f14ea9d066a SHA-256: c992ed351421b70a5d2795aad5dbf32b82e0e42c66b45ce459afb38f3934d2d3
184 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.
  • 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.
  • 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://cctraff.ru/aws?keyword=difference+between+480p+and+480i In PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/novabe.pdfIn PDF document text
    • https://xogunepole.weebly.com/uploads/1/3/4/5/134529021/444bd31e0450e8e.pdfIn PDF document text
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/9306225.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/8331361.pdfIn PDF document text
    • https://sewemojokevapu.weebly.com/uploads/1/3/4/4/134463988/bofabutizon-kedujavog-vorojugifopejuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f870fa7cb40d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jogesewafa.files.wordpress.com/2020/11/tasolilisezufelikelunate.pdfIn PDF document text
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/navy_service_uniform_belt.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/chase_mortgage_address_to_mail_payment.pdfIn PDF document text
    • https://mikosefuz492460143.files.wordpress.com/2020/11/70777988362.pdfIn PDF document text
    • https://serosekufe.files.wordpress.com/2020/11/60373137157.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_off00006a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A09 5592 bytes
SHA-256: 691e40fc2ca191d11f78e7b0f181e06761d43b865183e09155ddeaa62a06ec28
font_01_sfnt_off00007d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 10088 bytes
SHA-256: 7b62c5352702632a1a74b7b219dd60658cf748ec0f0d79f06ef64115ab2b024e

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