Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abb29d8ade89212…

MALICIOUS

PDF

43.2 KB Created: 2020-10-15 10:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e5f551dfce2779fd43d08e681266bdd3 SHA-1: 8229f5439e9c0640664adcf7afcb930746be9441 SHA-256: 8abb29d8ade892127e32f986f8108dd6cc85f9dce37e29c238f261feb7115be2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, with several pointing to known malicious redirectors or link farms. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous links suggests an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=types+of+bjt+biasing+pdf In PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/jeziwaradovagu.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/e09811dcb321b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f875eecb1eb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f87b76ea8707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4202/8706/files/noxabajumufugesegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3920/2197/files/amazing_matter_worksheet_answers_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0853/files/7502793739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a238c4e-b83e-4985-a20e-16143ae0d615/24610724939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/121fb5aa-7dda-4605-aecb-83d869f1d17b/neroje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d42793b-d750-42df-99ce-a13383ce0d55/56456348967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5fabe2-3c36-40ad-8b32-8e2250520822/genadaxaponi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee64741-5106-4cfa-9dbf-98fc30222e6a/pobodakenud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068ab080-0bf8-4cbf-9b6d-921acd8608e8/21166040890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404ae375-3eab-4227-9044-0c87c1963571/bidareneje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4c2cef-ffcc-45ab-a322-4665f7ed3d50/xumakafebuwaputimeguxuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7950da-b353-41bd-9e77-8417ec7a595c/6633536582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d451b4cc-f8cd-46c6-9cec-8260ddae477b/pisoretixozatoxu.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_off00006ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 5348 bytes
SHA-256: a238300506b1420fae63d5e80114e4ff917328cb1b30dbb3a3aca920cc024fad
font_01_sfnt_off00007d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D30 10116 bytes
SHA-256: 126ffd81869b87db28a73b48e2ba2d32444ecae155cf8a9e7b8253d0eb018942

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