Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56b3da817b42321…

MALICIOUS

PDF

48.8 KB Created: 2020-10-29 00:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b0da19b9761e99c9fad6fe45f3171a94 SHA-1: ac59bc6bb0c29166dd07c5bd0a89e8ffe1fa8735 SHA-256: d56b3da817b4232104d1e926eb8c9504694e7cec183cb68e3a8b581739a85f73
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/strik?keyword=dx4+remote+quadcopter+controller In PDF document text
    • https://zipalusub.weebly.com/uploads/1/3/4/3/134343211/bd01dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f93a2e5d5d71.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/db4194ada4fb96.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/zolopetadivo_gatudavolufeg.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/6941374.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/51cf9.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/jowozidikusekasar.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/fusipanobopofol_kowelen_suwulavajis_gigexinexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5f93e85deb3db.pdfIn PDF document text
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/8462759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f8b7f7533082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f88d1649bf8c.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f89e2643f55e.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007f45.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007f45.bin)
    • https://uploads.strikinglycdn.com/files/628889bd-9d72-4782-951c-0cf9100ede47/30642952732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96274f66-b254-452b-9faa-d01cd747ba11/dekizopinufufabizuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/55195198033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6337/7056/files/duleve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7590/6973/files/nasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7724/8192/files/55989202609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e37619-7e98-4d72-a5b2-939989d97e19/final_fantasy_tactics_sprites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5664/0412/files/najojigize.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 extracted file (font_00_sfnt_off00007f45.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 5324 bytes
SHA-256: ba052073db0452d92e54bf4afede11aaf1a83f6ab64d9c29583ece3226e1213c
font_01_sfnt_off00009153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9153 10640 bytes
SHA-256: a3933d31d2475144f732111eb3b4e8c1bc0aa213d1cf3c728b785d34b0db9108