Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37c88549d7277e9…

MALICIOUS

PDF

44.3 KB Created: 2020-10-01 16:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c6ed785d0e626c1663731d5e75c2da7e SHA-1: f28ac1b92f68011089a4953a8b5f41eeeec89b2a SHA-256: b37c88549d7277e9d9f8aeb3d8e4786669c75e17f2b7541840b551eceaa432fe
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=10th+new+science+book+english+medium+in+pdf In PDF document text
    • http://files.northeasthamilton.org/uploads/1/3/2/7/132712000/1218133.pdfIn PDF document text
    • http://konoja.lifetransforminghabits.com/uploads/1/3/1/4/131453684/e65ab6d4f36f.pdfIn PDF document text
    • http://mofode.mcclainmatthewsinsurance.com/uploads/1/3/2/3/132303382/kenemifekow-pataxak.pdfIn PDF document text
    • https://site-1039948.mozfiles.com/files/1039948/6628927309.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/75624342727.pdfIn PDF document text
    • https://site-1039153.mozfiles.com/files/1039153/43782138859.pdfIn PDF document text
    • http://files.somethingsoldsomethingsnew.com/uploads/1/3/1/3/131381681/lugibufokobe.pdfIn PDF document text
    • http://files.thefood.biz/uploads/1/3/2/7/132740692/tinenuralujiraf.pdfIn PDF document text
    • http://files.agooacademy.com/uploads/1/3/1/3/131381540/wudefelanunerevos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/3318bbfa-f509-457c-9dca-ffbbcc19ed26/3184509675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f21ace4-4c75-4d98-8e7c-51b8fad5263c/12148333279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d066703-90b8-44ea-84ae-950483850162/14060663128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22bb03e-586d-4feb-87fb-9bdee5e17e52/pisuxolomegateletodarap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebcf456-3ad5-4d55-bd89-211ec13b12d4/bidogokavufudukowedad.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_off00005d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 5656 bytes
SHA-256: 2e0c969f44c4f95740eab71ff5394a78f85b59179e93e66401fc540d469dcecb
font_01_sfnt_off000070c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C4 5108 bytes
SHA-256: f82fa1c952027e8d3e1a86110e0eea4b89f2dff4f8423324dd65b45ed3e9af49
font_02_sfnt_off000080dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DC 10376 bytes
SHA-256: f9442260cf11c8a750d1409664e4b56fd3f376294b639a003ef5de030ee423f8

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