Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c18be3e2fd5dc8…

MALICIOUS

PDF

47.7 KB Created: 2020-10-15 07:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 0fdcfde1be2aace5f1ca1e79d2c922d4 SHA-1: d3906f4f95b95b63e5a38a9ebda5ca78793af883 SHA-256: a8c18be3e2fd5dc8b91e64b21284a5fb3454e29d029ecfc2b6ee0e4662fa9b80
124 Risk Score

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 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/strik?keyword=react+native+swiper+android+issue In PDF document text
    • https://site-1039405.mozfiles.com/files/1039405/92769686461.pdfIn PDF document text
    • https://site-1039491.mozfiles.com/files/1039491/fusufidogur.pdfIn PDF document text
    • https://site-1041861.mozfiles.com/files/1041861/lomiresabik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f86fb714acbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87312d88900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f878cb37d475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87c57b5d366.pdfIn PDF document text
    • https://site-1038600.mozfiles.com/files/1038600/zejatutatexilunaxuwasok.pdfIn PDF document text
    • https://site-1043126.mozfiles.com/files/1043126/75577979432.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/sopomataxoguxudedilajeze.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/77760621409.pdfIn PDF document text
    • https://site-1043035.mozfiles.com/files/1043035/pivoredewifamib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f87bc7e2250b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f87004d26a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f87b74a1326f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8787887b564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8764d5deed6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8434de3c-f8a1-4820-b212-3df4909d179c/zasomujewudotovenowela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22e428c-443c-46d5-a731-8bb1b0af915f/26796190322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8b19ca-218a-4b20-9ed5-58e47169713e/punejaxebowivikibesum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb7720d-07de-4ea6-a2b9-8c6ee8d46079/kogafilakufalu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7E 5076 bytes
SHA-256: f0b7ff9b1da8c149de2995901263501afc3b9e859d15dd5a1f0e9711a917f0e1
font_01_sfnt_off00007cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDE 11228 bytes
SHA-256: b09391e64903fa8f9841d7a8843b4aec9a24468cec263eef405ed4481cae128f
font_02_sfnt_off0000a2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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