Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4879de749da05a3…

MALICIOUS

PDF

43.8 KB Created: 2020-10-05 01:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: faf8c55a9464341b0909962188be2169 SHA-1: c77c501333aca0209559fd18cfdc3075aef33f2c SHA-256: b4879de749da05a367d93cb366a26b5ff05e466eff7a8e07b2da77d3210de5c8
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=cadbury+report+1992+pdf In PDF document text
    • http://files.vanastracommunitycrc.org/uploads/1/3/0/7/130775432/metasazarovokanibup.pdfIn PDF document text
    • http://files.maggieessig.com/uploads/1/3/1/3/131398296/mutovijakurup_rerojijaki_xoromete_dekazem.pdfIn PDF document text
    • http://files.mbchurchstl.com/uploads/1/3/1/4/131438348/bamosawerol.pdfIn PDF document text
    • http://files.irish-geneaography.com/uploads/1/3/0/8/130814467/7b658ce2ba.pdfIn PDF document text
    • http://files.avalonrosecraftworks.com/uploads/1/3/0/9/130969980/d76346.pdfIn PDF document text
    • http://files.globalqualityenglish.org/uploads/1/3/1/3/131398555/1f8eefe7f516.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/1eed6266-d3ef-4f7d-9638-c9b255b3f03c/pexigivipozuwuwizetat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb3b237b-6f34-4152-a4cc-94e3d8e2e446/49210452360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a948d892-efb0-44e4-9b78-396d01d3b0d2/37932688703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5746176-a7f9-46c5-b712-8e71e6b64305/vupijewujexivipurawosisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4928ff77-dcc2-4f22-a183-84389eb07d7a/10498991377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8466/7808/files/the_environment_and_you.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2976/6045/files/nba_live_mobile_cheats_no_human_verification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9984/3485/files/financial_peace_university_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/bowstring_truss_repair.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_off00006cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 5312 bytes
SHA-256: b5616c2c6a2f44aba00038b58290097f6d122005b239e237fdaaf3fb0421e3bf
font_01_sfnt_off00007ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 10292 bytes
SHA-256: 7b1b56da4313ff6fb8b0a081bc38b9e9b87e206a1fdd6fa7a8829aec71075774

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